Question: who wrote the book the wizard of oz
[{'answer': 'L. Frank Baum', 'provenance': [{'wikipedia_id': '54436', 'title': 'The Wonderful Wizard of Oz', 'start_paragraph_id': 1, 'start_character': 80, 'end_paragraph_id': 1, 'end_character': 93, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '54436', 'title': 'The Wonderful Wizard of Oz', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 404, 'bleu_score': 0.6640379284650161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8031064627803154332}, 'section': 'Section::::Abstract.'}]}]