Question: who was president when the bombs were dropped on japan
[{'answer': 'President Harry S. Truman', 'provenance': [{'wikipedia_id': '11778948', 'title': 'Atomic bombings of Hiroshima and Nagasaki', 'start_paragraph_id': 40, 'start_character': 217, 'end_paragraph_id': 40, 'end_character': 242, 'bleu_score': 1.0, 'section': 'Section::::Preparations.:Choice of targets.\n'}]}, {'provenance': [{'wikipedia_id': '11778948', 'title': 'Atomic bombings of Hiroshima and Nagasaki', 'start_paragraph_id': 40, 'start_character': 0, 'end_paragraph_id': 40, 'end_character': 633, 'bleu_score': 0.9808590314834971, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2893174447198019218}, 'section': 'Section::::Preparations.:Choice of targets.\n'}]}]