Question: who was looking for a heart in the wizard of oz
[{'answer': 'Tin Woodman', 'provenance': [{'wikipedia_id': '509931', 'title': 'Tin Woodman', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '509931', 'title': 'Tin Woodman', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 818, 'bleu_score': 0.9870543337942441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5840982909716983988}, 'section': 'Section::::Character in the book series.\n'}]}]