Question: when was the atomic bomb dropped on nagasaki japan
[{'answer': 'August 9 , 1945', 'provenance': [{'wikipedia_id': '11778948', 'title': 'Atomic bombings of Hiroshima and Nagasaki', 'start_paragraph_id': 96, 'start_character': 27, 'end_paragraph_id': 96, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Nagasaki.:Bombing of Nagasaki.\n'}]}]