tokens: If you do a show shard statement in the influx command line it should tell you the start and end date time of the data ( across all series in the database ) contained in that shard .
ner_tags: O O O O B-Code_Block I-Code_Block O O O B-Application I-Application I-Application O O O O O O O O O O O O O O O O O O O O O O O O B-Data_Structure O