Question: who is big brother and the holding company
[{'answer': 'an American rock band', 'provenance': [{'wikipedia_id': '610704', 'title': 'Big Brother and the Holding Company', 'start_paragraph_id': 1, 'start_character': 39, 'end_paragraph_id': 1, 'end_character': 60, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the band that featured Janis Joplin as their lead singer'}, {'provenance': [{'wikipedia_id': '610704', 'title': 'Big Brother and the Holding Company', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 637, 'bleu_score': 0.95005935086738, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7785821627463595775}, 'section': 'Section::::Abstract.'}]}]