arch

var spanGroupData = [ {"timestamp": 1454313600, "group": [ {"author_id": 0, "token_count": 4772}, ]}, {"timestamp": 1456819200, "group": [ {"author_id": 0, "token_count": 6}, ]}, {"timestamp": 1467356400, "group": [ {"author_id": 0, "token_count": 227}, ]}, {"timestamp": 1475305200, "group": [ {"author_id": 0, "token_count": 33}, ]}, {"timestamp": 1480579200, "group": [ {"author_id": 4, "token_count": 1}, ]}, {"timestamp": 1483257600, "group": [ {"author_id": 4, "token_count": 4}, ]}, {"timestamp": 1496300400, "group": [ {"author_id": 0, "token_count": 1386}, ]}, {"timestamp": 1498892400, "group": [ {"author_id": 0, "token_count": 216}, ]}, {"timestamp": 1501570800, "group": [ {"author_id": 0, "token_count": 96}, ]}, {"timestamp": 1504249200, "group": [ {"author_id": 0, "token_count": 44}, ]}, {"timestamp": 1509519600, "group": [ {"author_id": 1, "token_count": 33}, {"author_id": 0, "token_count": 8}, ]}, {"timestamp": 1512115200, "group": [ {"author_id": 5, "token_count": 1}, ]}, {"timestamp": 1525158000, "group": [ {"author_id": 1, "token_count": 60}, {"author_id": 0, "token_count": 8}, ]}, {"timestamp": 1549008000, "group": [ {"author_id": 2, "token_count": 52}, ]}, {"timestamp": 1556694000, "group": [ {"author_id": 3, "token_count": 14}, ]}, {"timestamp": 1561964400, "group": [ {"author_id": 0, "token_count": 2}, ]}, ]