A viewset for viewing and editing Bridges.

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    "count": 373,
    "next": "https://seshat-db.com/api/sc/bridges/?format=api&page=6",
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        {
            "id": 201,
            "polity": {
                "id": 286,
                "name": "mn_uygur_khaganate",
                "long_name": "Uigur Khaganate",
                "start_year": 745,
                "end_year": 840
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 202,
            "polity": {
                "id": 438,
                "name": "mn_xianbei",
                "long_name": "Xianbei Confederation",
                "start_year": 100,
                "end_year": 250
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 203,
            "polity": {
                "id": 437,
                "name": "mn_hunnu_early",
                "long_name": "Early Xiongnu",
                "start_year": -1400,
                "end_year": -300
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Not enough data, though it seems to reasonable infer absence."
        },
        {
            "id": 204,
            "polity": {
                "id": 274,
                "name": "mn_hunnu_late",
                "long_name": "Late Xiongnu",
                "start_year": -60,
                "end_year": 100
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 205,
            "polity": {
                "id": 272,
                "name": "mn_hunnu_emp",
                "long_name": "Xiongnu Imperial Confederation",
                "start_year": -209,
                "end_year": -60
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 206,
            "polity": {
                "id": 444,
                "name": "mn_zungharian_emp",
                "long_name": "Zungharian Empire",
                "start_year": 1670,
                "end_year": 1757
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 207,
            "polity": {
                "id": 224,
                "name": "mr_wagadu_3",
                "long_name": "Later Wagadu Empire",
                "start_year": 1078,
                "end_year": 1203
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 208,
            "polity": {
                "id": 216,
                "name": "mr_wagadu_2",
                "long_name": "Middle Wagadu Empire",
                "start_year": 700,
                "end_year": 1077
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 209,
            "polity": {
                "id": 525,
                "name": "mx_monte_alban_1_early",
                "long_name": "Early Monte Alban I",
                "start_year": -500,
                "end_year": -300
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Sources do not suggest there is evidence for the construction of bridges during this period.§REF§Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.§REF§"
        },
        {
            "id": 210,
            "polity": {
                "id": 526,
                "name": "mx_monte_alban_1_late",
                "long_name": "Monte Alban Late I",
                "start_year": -300,
                "end_year": -100
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Sources do not suggest there is evidence for the construction of bridges during this period.§REF§Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.§REF§"
        },
        {
            "id": 211,
            "polity": {
                "id": 527,
                "name": "mx_monte_alban_2",
                "long_name": "Monte Alban II",
                "start_year": -100,
                "end_year": 200
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Sources do not suggest there is evidence for the construction of bridges during this period.§REF§Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.§REF§"
        },
        {
            "id": 212,
            "polity": {
                "id": 528,
                "name": "mx_monte_alban_3_a",
                "long_name": "Monte Alban III",
                "start_year": 200,
                "end_year": 500
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Sources do not suggest there is evidence for the construction of bridges during this period.§REF§Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.§REF§"
        },
        {
            "id": 213,
            "polity": {
                "id": 529,
                "name": "mx_monte_alban_3_b_4",
                "long_name": "Monte Alban IIIB and IV",
                "start_year": 500,
                "end_year": 900
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Sources do not suggest there is evidence for bridges in prehispanic Valley of Oaxaca.§REF§Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.§REF§"
        },
        {
            "id": 214,
            "polity": {
                "id": 532,
                "name": "mx_monte_alban_5",
                "long_name": "Monte Alban V",
                "start_year": 900,
                "end_year": 1520
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " There is no evidence for bridges in prehispanic Valley of Oaxaca.§REF§Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.§REF§"
        },
        {
            "id": 215,
            "polity": {
                "id": 8,
                "name": "mx_basin_of_mexico_3",
                "long_name": "Early Formative Basin of Mexico",
                "start_year": -1200,
                "end_year": -801
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": " regional and long-distance trade (crossing rivers) was common,§REF§Grove, David C. (2000) \"The Preclassic Societies of the Central Highlands of Mesoamerica.\" In Richard Adams and Murdo MacLeod (eds.), <i>The Cambridge History of The Native Peoples of the Americas, Volume II: Mesoamerica, Part I.</i> Cambridge: Cambridge University Press, pg.122-151.§REF§§REF§Plunket, P., &amp; Uruñuela, G. (2012). Where east meets west: the Formative in Mexico’s central highlands. <i>Journal of Archaeological Research</i>, 20(1), 1-51.§REF§ but no evidence of bridges exists in the limited archaeological record of the Early Formative"
        },
        {
            "id": 216,
            "polity": {
                "id": 10,
                "name": "mx_basin_of_mexico_5",
                "long_name": "Late Formative Basin of Mexico",
                "start_year": -400,
                "end_year": -101
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": " Regional and long-distance trade (crossing rivers) was common,§REF§Grove, David C. (2000) \"The Preclassic Societies of the Central Highlands of Mesoamerica.\" In Richard Adams and Murdo MacLeod (eds.), <i>The Cambridge History of The Native Peoples of the Americas, Volume II: Mesoamerica, Part I.</i> Cambridge: Cambridge University Press, pg.122-151.§REF§§REF§Plunket, P., &amp; Uruñuela, G. (2012). Where east meets west: the Formative in Mexico’s central highlands. <i>Journal of Archaeological Research</i>, 20(1), 1-51.§REF§ but no evidence of bridges exists in the limited archaeological record of the Formative"
        },
        {
            "id": 217,
            "polity": {
                "id": 9,
                "name": "mx_basin_of_mexico_4",
                "long_name": "Middle Formative Basin of Mexico",
                "start_year": -800,
                "end_year": -401
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": " regional and long-distance trade (crossing rivers) was common,§REF§Grove, David C. (2000) \"The Preclassic Societies of the Central Highlands of Mesoamerica.\" In Richard Adams and Murdo MacLeod (eds.), <i>The Cambridge History of The Native Peoples of the Americas, Volume II: Mesoamerica, Part I.</i> Cambridge: Cambridge University Press, pg.122-151.§REF§§REF§Plunket, P., &amp; Uruñuela, G. (2012). Where east meets west: the Formative in Mexico’s central highlands. <i>Journal of Archaeological Research</i>, 20(1), 1-51.§REF§ but no evidence of bridges exists in the limited archaeological record of the Early Formative"
        },
        {
            "id": 218,
            "polity": {
                "id": 11,
                "name": "mx_basin_of_mexico_6",
                "long_name": "Terminal Formative Basin of Mexico",
                "start_year": -100,
                "end_year": 99
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": " Regional and long-distance trade (crossing rivers) was common,§REF§Grove, David C. (2000) \"The Preclassic Societies of the Central Highlands of Mesoamerica.\" In Richard Adams and Murdo MacLeod (eds.), <i>The Cambridge History of The Native Peoples of the Americas, Volume II: Mesoamerica, Part I.</i> Cambridge: Cambridge University Press, pg.122-151.§REF§§REF§Plunket, P., &amp; Uruñuela, G. (2012). Where east meets west: the Formative in Mexico’s central highlands. <i>Journal of Archaeological Research</i>, 20(1), 1-51.§REF§ but no evidence of bridges exists in the limited archaeological record of the Early Formative"
        },
        {
            "id": 219,
            "polity": {
                "id": 524,
                "name": "mx_rosario",
                "long_name": "Oaxaca - Rosario",
                "start_year": -700,
                "end_year": -500
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Sources do not suggest there is evidence for the construction of bridges during this period.§REF§Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.§REF§"
        },
        {
            "id": 220,
            "polity": {
                "id": 523,
                "name": "mx_san_jose",
                "long_name": "Oaxaca - San Jose",
                "start_year": -1150,
                "end_year": -700
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Sources do not suggest there is evidence for bridges in this period.§REF§Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.§REF§"
        },
        {
            "id": 221,
            "polity": {
                "id": 522,
                "name": "mx_tierras_largas",
                "long_name": "Oaxaca - Tierras Largas",
                "start_year": -1400,
                "end_year": -1150
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Sources do not suggest there is evidence for bridges in this period.§REF§Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.§REF§"
        },
        {
            "id": 222,
            "polity": {
                "id": 116,
                "name": "no_norway_k_2",
                "long_name": "Kingdom of Norway II",
                "start_year": 1262,
                "end_year": 1396
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " There were a few bridges, but these were not polity owned. §REF§Árni Daniel Júlíusson and Axel Kristissen 2017, pers. comm. to E. Brandl and D. Mullins§REF§"
        },
        {
            "id": 223,
            "polity": {
                "id": 79,
                "name": "pe_cuzco_3",
                "long_name": "Cuzco - Early Intermediate II",
                "start_year": 500,
                "end_year": 649
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 224,
            "polity": {
                "id": 77,
                "name": "pe_cuzco_1",
                "long_name": "Cuzco - Late Formative",
                "start_year": -500,
                "end_year": 200
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 225,
            "polity": {
                "id": 83,
                "name": "pe_inca_emp",
                "long_name": "Inca Empire",
                "start_year": 1375,
                "end_year": 1532
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " Officials responsible for bridges §REF§(Bauer 2004, 22)§REF§ Rope suspension bridges on thick grass cables which had to be remade every year. §REF§(Kaufmann and Kaufmann 2012)§REF§ Example at the Apurimac river: Keshwa Cacha. §REF§<a class=\"external free\" href=\"http://www.slate.com/articles/life/world_of_wonders/2011/02/the_last_incan_grass_bridge.html\" rel=\"nofollow\">http://www.slate.com/articles/life/world_of_wonders/2011/02/the_last_incan_grass_bridge.html</a>§REF§"
        },
        {
            "id": 226,
            "polity": {
                "id": 80,
                "name": "pe_wari_emp",
                "long_name": "Wari Empire",
                "start_year": 650,
                "end_year": 999
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " \"In the case of the Wari Empire, a major administrative structure was needed, but there was no local political organization to use as a foundation for this structure. As a result, it had to build from the ground up: a large center, small satellite centers, terraces to increase agricultural production, new villages nearer the terraced zone, a road system, a bridge, etc.\" §REF§(Schreiber 1987, 281)§REF§. Example from the Carahuarazo valley."
        },
        {
            "id": 227,
            "polity": {
                "id": 445,
                "name": "pg_orokaiva_pre_colonial",
                "long_name": "Orokaiva - Pre-Colonial",
                "start_year": 1734,
                "end_year": 1883
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " According to SCCS variable 14 'Routes of Land Transport' only ‘1’ or 'unimproved trails' were used for land transport, not roads. The Orokaiva constructed wooden bridges or gangways: 'Bridges. Formerly, I am told, stretches of swamp were spanned by single logs supported on cross-trestles. The modern type of this bridge has an adzed surface to make walking safer, and is certainly preferable to the other style (viz. a raised gangway with clumsily laid cross-pieces) until, as is so often the case, the log is found to be slippery and aslant. Small creeks are crossed by single tree-trunks, over which the native, a fearless balancer, walks without misgiving, despite the queer and disconcerting vibrations set up by his footsteps on a long log.' §REF§Williams, F. E. (Francis Edgar), and Hubert Murray 1930. “Orokaiva Society”, 72§REF§"
        },
        {
            "id": 228,
            "polity": {
                "id": 446,
                "name": "pg_orokaiva_colonial",
                "long_name": "Orokaiva - Colonial",
                "start_year": 1884,
                "end_year": 1942
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " According to SCCS variable 14 'Routes of Land Transport' only ‘1’ or 'unimproved trails' were used for land transport, not roads. The Orokaiva constructed wooden bridges or gangways: 'Bridges. Formerly, I am told, stretches of swamp were spanned by single logs supported on cross-trestles. The modern type of this bridge has an adzed surface to make walking safer, and is certainly preferable to the other style (viz. a raised gangway with clumsily laid cross-pieces) until, as is so often the case, the log is found to be slippery and aslant. Small creeks are crossed by single tree-trunks, over which the native, a fearless balancer, walks without misgiving, despite the queer and disconcerting vibrations set up by his footsteps on a long log.' §REF§Williams, F. E. (Francis Edgar), and Hubert Murray 1930. “Orokaiva Society”, 72§REF§ By the time of the Mt. Lamington eruption, the colonial authorities had built bridges for its own infrastructural needs: 'When the volcano erupted on 21 January 1951, Koropatans noticed the dark smoke and cloud and saw ash and stones carried through the air. The survivors including the sick moved to Wairope on the Kumusi bridge. A married couple from Koropata, Stephenson Kareka and Flora Amaupa, evoked the scene: ‘There was no water and no food as both had been spoiled by the lava and ash. The government supplied food. They flew in rice and fish. The people stayed at Wairope for three months. After that time, Bishop David Hand sent the people back to the villages as the volcano had finished …’' §REF§Newton, Janice 1985. “Orokaiva Production And Change”, 59§REF§ [Even in colonial settlements, services were of a makeshift character.]"
        },
        {
            "id": 229,
            "polity": {
                "id": 117,
                "name": "pk_kachi_enl",
                "long_name": "Kachi Plain - Aceramic Neolithic",
                "start_year": -7500,
                "end_year": -5500
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 230,
            "polity": {
                "id": 118,
                "name": "pk_kachi_lnl",
                "long_name": "Kachi Plain - Ceramic Neolithic",
                "start_year": -5500,
                "end_year": -4000
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 231,
            "polity": {
                "id": 119,
                "name": "pk_kachi_ca",
                "long_name": "Kachi Plain - Chalcolithic",
                "start_year": -4000,
                "end_year": -3200
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 232,
            "polity": {
                "id": 123,
                "name": "pk_kachi_post_urban",
                "long_name": "Kachi Plain - Post-Urban Period",
                "start_year": -1800,
                "end_year": -1300
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": null
        },
        {
            "id": 233,
            "polity": {
                "id": 120,
                "name": "pk_kachi_pre_urban",
                "long_name": "Kachi Plain - Pre-Urban Period",
                "start_year": -3200,
                "end_year": -2500
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 234,
            "polity": {
                "id": 121,
                "name": "pk_kachi_urban_1",
                "long_name": "Kachi Plain - Urban Period I",
                "start_year": -2500,
                "end_year": -2100
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 235,
            "polity": {
                "id": 122,
                "name": "pk_kachi_urban_2",
                "long_name": "Kachi Plain - Urban Period II",
                "start_year": -2100,
                "end_year": -1800
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 236,
            "polity": {
                "id": 194,
                "name": "ru_sakha_early",
                "long_name": "Sakha - Early",
                "start_year": 1400,
                "end_year": 1632
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " Built-up transport infrastructure was introduced in the early Russian period (see next sheet)."
        },
        {
            "id": 237,
            "polity": {
                "id": 195,
                "name": "ru_sakha_late",
                "long_name": "Sakha - Late",
                "start_year": 1632,
                "end_year": 1900
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": " The Sakha relied on recently introduced boats and rafts rather than bridges: 'Besides these above mentioned indirect proofs, direct traditions have been preserved among the Yakut which testify to the fact that the Yakut became acquainted with boats, nets, and fishing in general only comparatively recently.' §REF§Sieroszewski, Wacław 1993. “Yakut: An Experiment In Ethnographic Research”, 528§REF§ 'Last of all, the Yakut do not have a single name of their own for fishing boats and vessels. Rafts are given the Russian name puluot, or bulot; in general they call boats by the Tungus name ogongcho. Karbas sewn out of boards are called, as in Russian, karbas. They fr ankly ackn owledge that the birch-bark boat is of Tungus origin, calling it tongus or omuk ogongcho. The round-bottomed Russian barge, the dug-out, is called ustrus, while the flat-bottomed vetka is given the most varied names, depending on the locality; in the neighborhood of Olekminsk, in the Yakutsk Okrug, and on the Aldan the Yakut have the same name for it as the Buryat - bat, or they give it the Russian name - betky; on the Boganida it is called toy, on the Vilyuy, Kolyma, and Yana, it is sometimes called tyy, sometimes ty. The Yenisey Ostyak use just this same word ti (ti) with a drawn out i on the end for a boat of medium size, which has the same relation as the Yakut ty on the one side to the birch-bark boat, and on the other side to the karbas (see fig. 34).' §REF§Sieroszewski, Wacław 1993. “Yakut: An Experiment In Ethnographic Research”, 525§REF§"
        },
        {
            "id": 238,
            "polity": {
                "id": 521,
                "name": "eg_kushite",
                "long_name": "Egypt - Kushite Period",
                "start_year": -747,
                "end_year": -656
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " Small bridges existed in Ramesside Egypt.§REF§(Arnold 2003, 37)§REF§"
        },
        {
            "id": 239,
            "polity": {
                "id": 131,
                "name": "sy_umayyad_cal",
                "long_name": "Umayyad Caliphate",
                "start_year": 661,
                "end_year": 750
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " Boat bridge over river Nile.§REF§(Raymond 2000, 21)§REF§ \"Bridge building and renovation was an essential part of imperial building programs in the Islamic lands ... Many early bridges were decorated with stone plaques that commerated their patron.\" §REF§'Bridge' in Bloom and Blair, eds. 2009, p.304.§REF§"
        },
        {
            "id": 240,
            "polity": {
                "id": 44,
                "name": "th_ayutthaya",
                "long_name": "Ayutthaya",
                "start_year": 1593,
                "end_year": 1767
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " §REF§<a class=\"external free\" href=\"http://www.ayutthaya-history.com/Geo_Street_BridgesKhaoPluak.html\" rel=\"nofollow\">http://www.ayutthaya-history.com/Geo_Street_BridgesKhaoPluak.html</a>§REF§"
        },
        {
            "id": 241,
            "polity": {
                "id": 45,
                "name": "th_rattanakosin",
                "long_name": "Rattanakosin",
                "start_year": 1782,
                "end_year": 1873
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " Inferred from the fact that bridges existed in Ayutthaya §REF§<a class=\"external free\" href=\"http://www.ayutthaya-history.com/Geo_Street_BridgesKhaoPluak.html\" rel=\"nofollow\">http://www.ayutthaya-history.com/Geo_Street_BridgesKhaoPluak.html</a>§REF§ and it does not seem like a type of technology that can be easily forgotten."
        },
        {
            "id": 242,
            "polity": {
                "id": 462,
                "name": "tj_sarasm",
                "long_name": "Sarazm",
                "start_year": -3500,
                "end_year": -2000
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 243,
            "polity": {
                "id": 221,
                "name": "tn_fatimid_cal",
                "long_name": "Fatimid Caliphate",
                "start_year": 909,
                "end_year": 1171
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " Great Bridge. §REF§(Raymond 2000, 48)§REF§"
        },
        {
            "id": 244,
            "polity": {
                "id": 163,
                "name": "tr_konya_lba",
                "long_name": "Konya Plain - Late Bronze Age II",
                "start_year": -1500,
                "end_year": -1400
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " The Citadel Büyükkale at Hattusa was connected to a system of stone viaducts and bridge with the Büyükkaya§REF§Makowski M. (2009) Świat późnej epoki brązu. pp.157 [In:] A. Smogorzewska (ed.) <i>Archeologia starożytnego Bliskiego Wschodu</i>, Warszawa: Instytut Archeologii UW, pp. 151-187)§REF§"
        },
        {
            "id": 245,
            "polity": {
                "id": 161,
                "name": "tr_central_anatolia_mba",
                "long_name": "Middle Bronze Age in Central Anatolia",
                "start_year": -2000,
                "end_year": -1700
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " §REF§Barjamovic G. 2011. <i>A Historical Geography of Anatolia in the Old Assyrian Colony Period</i>. Copenhagen: Museum Tusculanum Press, pg. 396§REF§"
        },
        {
            "id": 246,
            "polity": {
                "id": 73,
                "name": "tr_byzantine_emp_1",
                "long_name": "Byzantine Empire I",
                "start_year": 632,
                "end_year": 866
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " Preiser-Kapeller says present.§REF§(Johannes Preiser-Kapeller 2015) Institute for Medieval Research, Division of Byzantine Research, Austrian Academy of Sciences)§REF§ Bridges.§REF§(Belke 2008, 295-308) Jeffreys E, Haldon J and Cormack R eds. 2008. The Oxford Handbook of Byzantine Studies. Oxford University Press. Oxford.§REF§"
        },
        {
            "id": 247,
            "polity": {
                "id": 75,
                "name": "tr_byzantine_emp_2",
                "long_name": "Byzantine Empire II",
                "start_year": 867,
                "end_year": 1072
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " Preiser-Kapeller says present.§REF§(Preiser-Kapeller 2015) Institute for Medieval Research, Division of Byzantine Research, Austrian Academy of Sciences)§REF§ Bridges.§REF§(Belke 2008, 295-308) Jeffreys E, Haldon J and Cormack R eds. 2008. The Oxford Handbook of Byzantine Studies. Oxford University Press. Oxford.§REF§"
        },
        {
            "id": 248,
            "polity": {
                "id": 76,
                "name": "tr_byzantine_emp_3",
                "long_name": "Byzantine Empire III",
                "start_year": 1073,
                "end_year": 1204
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": " Preiser-Kapeller says present.§REF§(Preiser-Kapeller 2015) Institute for Medieval Research, Division of Byzantine Research, Austrian Academy of Sciences)§REF§ Bridges.§REF§(Belke 2008, 295-308) Jeffreys E, Haldon J and Cormack R eds. 2008. The Oxford Handbook of Byzantine Studies. Oxford University Press. Oxford.§REF§"
        },
        {
            "id": 249,
            "polity": {
                "id": 170,
                "name": "tr_cappadocia_2",
                "long_name": "Late Cappadocia",
                "start_year": -330,
                "end_year": 16
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "present",
            "comment": null,
            "description": "Pompeius organisation: “The ineffectual Ariobarzanes was restored yet again to the throne of Cappadocia. He retained the Tomisa bridgehead between Melitene and Sophene on the far bank of the Euphrates, given to him by Lucullus, which controlled the route across the Taurus to southern Armenia…” §REF§Sherwin-White, A. N. (1984) Roman Foreign Policy in the Near East, 168 BC to AD 1. London: Duckworth. p226§REF§"
        },
        {
            "id": 250,
            "polity": {
                "id": 158,
                "name": "tr_konya_eca",
                "long_name": "Konya Plain - Early Chalcolithic",
                "start_year": -6000,
                "end_year": -5500
            },
            "year_from": null,
            "year_to": null,
            "tag": "IFR",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Bridge",
            "bridge": "absent",
            "comment": null,
            "description": null
        }
    ]
}