interface

var spanGroupData = [ {"timestamp": 1372662000, "group": [ {"author_id": 0, "token_count": 24464}, ]}, {"timestamp": 1475305200, "group": [ {"author_id": 9, "token_count": 31}, {"author_id": 1, "token_count": 810}, {"author_id": 6, "token_count": 67}, {"author_id": 22, "token_count": 12}, ]}, {"timestamp": 1477983600, "group": [ {"author_id": 3, "token_count": 11}, {"author_id": 38, "token_count": 2}, {"author_id": 9, "token_count": 5}, {"author_id": 1, "token_count": 311}, ]}, {"timestamp": 1480579200, "group": [ {"author_id": 24, "token_count": 8}, ]}, {"timestamp": 1483257600, "group": [ {"author_id": 8, "token_count": 88}, {"author_id": 6, "token_count": 23}, ]}, {"timestamp": 1485936000, "group": [ {"author_id": 34, "token_count": 3}, {"author_id": 15, "token_count": 1}, {"author_id": 27, "token_count": 4}, {"author_id": 6, "token_count": 3}, ]}, {"timestamp": 1488355200, "group": [ {"author_id": 28, "token_count": 2}, {"author_id": 21, "token_count": 15}, {"author_id": 1, "token_count": 1986}, {"author_id": 15, "token_count": 19}, {"author_id": 6, "token_count": 1}, ]}, {"timestamp": 1493622000, "group": [ {"author_id": 8, "token_count": 72}, {"author_id": 6, "token_count": 125}, ]}, {"timestamp": 1504249200, "group": [ {"author_id": 11, "token_count": 6}, {"author_id": 6, "token_count": 20}, ]}, {"timestamp": 1506841200, "group": [ {"author_id": 25, "token_count": 7}, {"author_id": 11, "token_count": 29}, ]}, {"timestamp": 1512115200, "group": [ {"author_id": 32, "token_count": 3}, ]}, {"timestamp": 1517472000, "group": [ {"author_id": 3, "token_count": 1213}, ]}, {"timestamp": 1519891200, "group": [ {"author_id": 13, "token_count": 6}, {"author_id": 6, "token_count": 168}, ]}, {"timestamp": 1522566000, "group": [ {"author_id": 6, "token_count": 62}, ]}, {"timestamp": 1525158000, "group": [ {"author_id": 13, "token_count": 19}, ]}, {"timestamp": 1527836400, "group": [ {"author_id": 28, "token_count": 2}, {"author_id": 9, "token_count": 77}, ]}, {"timestamp": 1535785200, "group": [ {"author_id": 8, "token_count": 146}, ]}, {"timestamp": 1541055600, "group": [ {"author_id": 14, "token_count": 25}, {"author_id": 2, "token_count": 1411}, {"author_id": 20, "token_count": 16}, ]}, {"timestamp": 1543651200, "group": [ {"author_id": 3, "token_count": 79}, {"author_id": 4, "token_count": 821}, {"author_id": 6, "token_count": 125}, {"author_id": 30, "token_count": 3}, ]}, {"timestamp": 1546329600, "group": [ {"author_id": 40, "token_count": 1}, {"author_id": 8, "token_count": 6}, ]}, {"timestamp": 1551427200, "group": [ {"author_id": 10, "token_count": 22}, {"author_id": 26, "token_count": 5}, ]}, {"timestamp": 1554102000, "group": [ {"author_id": 37, "token_count": 2}, {"author_id": 9, "token_count": 24}, {"author_id": 18, "token_count": 19}, ]}, {"timestamp": 1556694000, "group": [ {"author_id": 10, "token_count": 55}, {"author_id": 2, "token_count": 18}, ]}, {"timestamp": 1567321200, "group": [ {"author_id": 17, "token_count": 19}, ]}, {"timestamp": 1569913200, "group": [ {"author_id": 35, "token_count": 2}, {"author_id": 16, "token_count": 20}, {"author_id": 39, "token_count": 1}, ]}, {"timestamp": 1572591600, "group": [ {"author_id": 7, "token_count": 479}, {"author_id": 5, "token_count": 291}, ]}, {"timestamp": 1575187200, "group": [ {"author_id": 5, "token_count": 4}, ]}, {"timestamp": 1577865600, "group": [ {"author_id": 2, "token_count": 1}, ]}, {"timestamp": 1580544000, "group": [ {"author_id": 5, "token_count": 502}, ]}, {"timestamp": 1583049600, "group": [ {"author_id": 31, "token_count": 3}, ]}, {"timestamp": 1588316400, "group": [ {"author_id": 33, "token_count": 3}, {"author_id": 19, "token_count": 18}, {"author_id": 2, "token_count": 75}, ]}, {"timestamp": 1590994800, "group": [ {"author_id": 12, "token_count": 33}, {"author_id": 2, "token_count": 574}, {"author_id": 8, "token_count": 5}, {"author_id": 23, "token_count": 9}, ]}, {"timestamp": 1593586800, "group": [ {"author_id": 29, "token_count": 4}, {"author_id": 36, "token_count": 2}, ]}, ]