rtla

var spanGroupData = [ {"timestamp": 1638345600, "group": [ {"author_id": 0, "token_count": 18931}, ]}, {"timestamp": 1643702400, "group": [ {"author_id": 0, "token_count": 49}, ]}, {"timestamp": 1646121600, "group": [ {"author_id": 0, "token_count": 3189}, ]}, {"timestamp": 1648796400, "group": [ {"author_id": 0, "token_count": 1}, {"author_id": 1, "token_count": 24}, ]}, {"timestamp": 1651388400, "group": [ {"author_id": 0, "token_count": 258}, ]}, {"timestamp": 1654066800, "group": [ {"author_id": 5, "token_count": 9}, ]}, {"timestamp": 1656658800, "group": [ {"author_id": 2, "token_count": 24}, ]}, {"timestamp": 1659337200, "group": [ {"author_id": 6, "token_count": 2}, ]}, {"timestamp": 1667286000, "group": [ {"author_id": 3, "token_count": 18}, ]}, {"timestamp": 1672560000, "group": [ {"author_id": 4, "token_count": 18}, {"author_id": 0, "token_count": 3990}, ]}, {"timestamp": 1675238400, "group": [ {"author_id": 0, "token_count": 544}, ]}, {"timestamp": 1677657600, "group": [ {"author_id": 0, "token_count": 140}, ]}, ]