A viewset for viewing and editing Mnemonic Devices.

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    "count": 243,
    "next": "https://seshat-db.com/api/sc/mnemonic-devices/?format=api&page=4",
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        {
            "id": 101,
            "polity": {
                "id": 148,
                "name": "jp_kamakura",
                "long_name": "Kamakura Shogunate",
                "start_year": 1185,
                "end_year": 1333
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 102,
            "polity": {
                "id": 145,
                "name": "jp_kofun",
                "long_name": "Kansai - Kofun Period",
                "start_year": 250,
                "end_year": 537
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 103,
            "polity": {
                "id": 263,
                "name": "jp_nara",
                "long_name": "Nara Kingdom",
                "start_year": 710,
                "end_year": 794
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 104,
            "polity": {
                "id": 150,
                "name": "jp_sengoku_jidai",
                "long_name": "Warring States Japan",
                "start_year": 1467,
                "end_year": 1568
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 105,
            "polity": {
                "id": 152,
                "name": "jp_tokugawa_shogunate",
                "long_name": "Tokugawa Shogunate",
                "start_year": 1603,
                "end_year": 1868
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 106,
            "polity": {
                "id": 144,
                "name": "jp_yayoi",
                "long_name": "Kansai - Yayoi Period",
                "start_year": -300,
                "end_year": 250
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": " 'now and then Chinese characters appeared on Yayoi pottery, showing a degree of literacy among craftsmen.' §REF§Kidder Jr., J. Edward, 2007. Himiko and Japan's Elusive Kingdom of Yamatai Honolulu: Hawaii University Press. p. 113§REF§"
        },
        {
            "id": 107,
            "polity": {
                "id": 289,
                "name": "kg_kara_khanid_dyn",
                "long_name": "Kara-Khanids",
                "start_year": 950,
                "end_year": 1212
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 108,
            "polity": {
                "id": 41,
                "name": "kh_angkor_2",
                "long_name": "Classical Angkor",
                "start_year": 1100,
                "end_year": 1220
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " 'Each year the mandarin chooses a day in the month which corresponds to the fourth Chinese month and notifies all the country. Each family with a daughter subject to chen-t'an notifies the mandarin. The mandarin sends a candle on which a mark is made. At nightfall of the appointed day, the candle is lighted and when it burns up to the mark, the moment of chen-t'an has arrived.'§REF§(Briggs 1951, p. 246)§REF§"
        },
        {
            "id": 109,
            "polity": {
                "id": 40,
                "name": "kh_angkor_1",
                "long_name": "Early Angkor",
                "start_year": 802,
                "end_year": 1100
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " 'Each year the mandarin chooses a day in the month which corresponds to the fourth Chinese month and notifies all the country. Each family with a daughter subject to chen-t'an notifies the mandarin. The mandarin sends a candle on which a mark is made. At nightfall of the appointed day, the candle is lighted and when it burns up to the mark, the moment of chen-t'an has arrived.'§REF§(Briggs 1951, p. 246)§REF§"
        },
        {
            "id": 110,
            "polity": {
                "id": 42,
                "name": "kh_angkor_3",
                "long_name": "Late Angkor",
                "start_year": 1220,
                "end_year": 1432
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " 'Each year the mandarin chooses a day in the month which corresponds to the fourth Chinese month and notifies all the country. Each family with a daughter subject to chen-t'an notifies the mandarin. The mandarin sends a candle on which a mark is made. At nightfall of the appointed day, the candle is lighted and when it burns up to the mark, the moment of chen-t'an has arrived.'§REF§(Briggs 1951, p. 246)§REF§"
        },
        {
            "id": 111,
            "polity": {
                "id": 43,
                "name": "kh_khmer_k",
                "long_name": "Khmer Kingdom",
                "start_year": 1432,
                "end_year": 1594
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " 'Each year the mandarin chooses a day in the month which corresponds to the fourth Chinese month and notifies all the country. Each family with a daughter subject to chen-t'an notifies the mandarin. The mandarin sends a candle on which a mark is made. At nightfall of the appointed day, the candle is lighted and when it burns up to the mark, the moment of chen-t'an has arrived.'§REF§(Briggs 1951, p. 246)§REF§"
        },
        {
            "id": 112,
            "polity": {
                "id": 104,
                "name": "lb_phoenician_emp",
                "long_name": "Phoenician Empire",
                "start_year": -1200,
                "end_year": -332
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 113,
            "polity": {
                "id": 427,
                "name": "ml_jenne_jeno_1",
                "long_name": "Jenne-jeno I",
                "start_year": -250,
                "end_year": 49
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 114,
            "polity": {
                "id": 428,
                "name": "ml_jenne_jeno_2",
                "long_name": "Jenne-jeno II",
                "start_year": 50,
                "end_year": 399
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 115,
            "polity": {
                "id": 430,
                "name": "ml_jenne_jeno_3",
                "long_name": "Jenne-jeno III",
                "start_year": 400,
                "end_year": 899
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 116,
            "polity": {
                "id": 431,
                "name": "ml_jenne_jeno_4",
                "long_name": "Jenne-jeno IV",
                "start_year": 900,
                "end_year": 1300
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 117,
            "polity": {
                "id": 229,
                "name": "ml_mali_emp",
                "long_name": "Mali Empire",
                "start_year": 1230,
                "end_year": 1410
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 118,
            "polity": {
                "id": 242,
                "name": "ml_songhai_2",
                "long_name": "Songhai Empire - Askiya Dynasty",
                "start_year": 1493,
                "end_year": 1591
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 119,
            "polity": {
                "id": 283,
                "name": "mn_turk_khaganate_1",
                "long_name": "Eastern Turk Khaganate",
                "start_year": 583,
                "end_year": 630
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 120,
            "polity": {
                "id": 288,
                "name": "mn_khitan_1",
                "long_name": "Khitan I",
                "start_year": 907,
                "end_year": 1125
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 121,
            "polity": {
                "id": 442,
                "name": "mn_mongol_early",
                "long_name": "Early Mongols",
                "start_year": 1000,
                "end_year": 1206
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "absent",
            "comment": null,
            "description": "Mongols did not have writing. However, the Naimans used Uyghur script. (Note: we need a category for syllabaries)"
        },
        {
            "id": 122,
            "polity": {
                "id": 440,
                "name": "mn_turk_khaganate_2",
                "long_name": "Second Turk Khaganate",
                "start_year": 682,
                "end_year": 744
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 123,
            "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": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 124,
            "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": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 125,
            "polity": {
                "id": 437,
                "name": "mn_hunnu_early",
                "long_name": "Early Xiongnu",
                "start_year": -1400,
                "end_year": -300
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 126,
            "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": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 127,
            "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": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 128,
            "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": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 129,
            "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": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 130,
            "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": "Mnemonic_device",
            "mnemonic_device": "absent",
            "comment": null,
            "description": " Glyphs dating to this period have been deciphered as either calendrical dates or the names of prisoners. Sources do not suggest that evidence for other types of writing has been found.§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": 131,
            "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": "Mnemonic_device",
            "mnemonic_device": "absent",
            "comment": null,
            "description": " Glyphs dating to this period have been deciphered as either calendrical dates or the names of prisoners. Sources do not suggest that evidence for other types of writing has been found.§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": 132,
            "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": "Mnemonic_device",
            "mnemonic_device": "absent",
            "comment": null,
            "description": " Glyphs dating to this period have been deciphered as either calendrical dates or the names of prisoners. Sources do not suggest that evidence for other types of writing has been found.§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": 133,
            "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": "Mnemonic_device",
            "mnemonic_device": "absent",
            "comment": null,
            "description": " Glyphs dating to this period have been deciphered as either calendrical dates or the names of prisoners. Sources do not suggest that evidence for other types of writing has been found.§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": 134,
            "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": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "absent",
            "comment": null,
            "description": " Genealogical registers of noble ancestry (including important marriages, and sometimes important life events of individuals) were recorded in stone during this period. Also carved glyphs denoting calendrical dates. Sources do not suggest that evidence for other types of writing has been found.§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": 135,
            "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": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "absent",
            "comment": null,
            "description": " Detailed documentation was written in Spanish after the end of 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": 136,
            "polity": {
                "id": 6,
                "name": "mx_basin_of_mexico_1",
                "long_name": "Archaic Basin of Mexico",
                "start_year": -6000,
                "end_year": -2001
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 137,
            "polity": {
                "id": 16,
                "name": "mx_aztec_emp",
                "long_name": "Aztec Empire",
                "start_year": 1427,
                "end_year": 1526
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 138,
            "polity": {
                "id": 13,
                "name": "mx_basin_of_mexico_8",
                "long_name": "Epiclassic Basin of Mexico",
                "start_year": 650,
                "end_year": 899
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 139,
            "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": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 140,
            "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": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 141,
            "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": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 142,
            "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": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 143,
            "polity": {
                "id": 7,
                "name": "mx_basin_of_mexico_2",
                "long_name": "Initial Formative Basin of Mexico",
                "start_year": -2000,
                "end_year": -1201
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 144,
            "polity": {
                "id": 15,
                "name": "mx_basin_of_mexico_10",
                "long_name": "Middle Postclassic Basin of Mexico",
                "start_year": 1200,
                "end_year": 1426
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 145,
            "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": "Mnemonic_device",
            "mnemonic_device": "absent",
            "comment": null,
            "description": " Sources do not suggest that evidence for writing other than carved glyphs has been found.§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": 146,
            "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": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": "The first written records in the Valley of Oaxaca are from the Rosario phase (700-500 BCE).§REF§Flannery, K. V. and J. Marcus (1983). \"The Cloud People.\" New York.§REF§§REF§Marcus, J. and K. V. Flannery (1996). Zapotec civilization: How urban society evolved in Mexico's Oaxaca Valley, Thames and Hudson London.§REF§ Written records are therefore coded as absent for this period."
        },
        {
            "id": 147,
            "polity": {
                "id": 14,
                "name": "mx_toltec",
                "long_name": "Toltecs",
                "start_year": 900,
                "end_year": 1199
            },
            "year_from": null,
            "year_to": null,
            "tag": "TRS",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "present",
            "comment": null,
            "description": " Present since the Archaic Period c. 10 ka.§REF§(Carballo, David. Personal Communication to Jill Levine and Peter Turchin. Email. April 23, 2020)§REF§"
        },
        {
            "id": 148,
            "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": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": " 'There were two kinds of writing systems. Until the introduction of Christianity around 1000 CE runes were used. Very few runes are preserved and these are mostly labels or scratches that cannot be interpreted. They were probably used for the exchange of notes between people and also had some ritualistic function. The evidence is extremely patchy. From 1000 CE onward the Latin Alphabet was used. Mnemonic devices might be unknown for the whole period.' §REF§Árni Daniel Júlíusson and Axel Kristissen 2017, pers. comm. to E. Brandl and D. Mullins§REF§"
        },
        {
            "id": 149,
            "polity": {
                "id": 78,
                "name": "pe_cuzco_2",
                "long_name": "Cuzco - Early Intermediate I",
                "start_year": 200,
                "end_year": 499
            },
            "year_from": null,
            "year_to": null,
            "tag": "SSP",
            "is_disputed": false,
            "is_uncertain": false,
            "name": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        },
        {
            "id": 150,
            "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": "Mnemonic_device",
            "mnemonic_device": "unknown",
            "comment": null,
            "description": null
        }
    ]
}