Question: who is the author of the berenstain bears books
[{'answer': 'Mike Berenstain', 'provenance': [{'wikipedia_id': '239758', 'title': 'Berenstain Bears', 'start_paragraph_id': 1, 'start_character': 121, 'end_paragraph_id': 1, 'end_character': 136, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '239758', 'title': 'Berenstain Bears', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 369, 'bleu_score': 0.96746874041754, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15747401272197684797}, 'section': 'Section::::Abstract.'}]}]