Question: who was the us president when hiroshima was bombed
[{'answer': 'President Truman', 'provenance': [{'wikipedia_id': '11778948', 'title': 'Atomic bombings of Hiroshima and Nagasaki', 'start_paragraph_id': 82, 'start_character': 452, 'end_paragraph_id': 82, 'end_character': 468, 'bleu_score': 1.0, 'section': 'Section::::Hiroshima.:Japanese realization of the bombing.\n'}]}, {'provenance': [{'wikipedia_id': '11778948', 'title': 'Atomic bombings of Hiroshima and Nagasaki', 'start_paragraph_id': 82, 'start_character': 0, 'end_paragraph_id': 82, 'end_character': 518, 'bleu_score': 0.887728868732194, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 716316517551916120}, 'section': 'Section::::Hiroshima.:Japanese realization of the bombing.\n'}]}]