Question: code name of the atomic bomb that was dropped on nagasaki
[{'answer': 'Fat Man', 'provenance': [{'wikipedia_id': '11660', 'title': 'Fat Man', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11660', 'title': 'Fat Man', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 509, 'bleu_score': 0.7530087267609451, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17588179200239369980}, 'section': 'Section::::Abstract.'}]}]