Question: when did the plane crash into the empire state building
[{'answer': 'July 28 , 1945', 'provenance': [{'wikipedia_id': '23784501', 'title': '1945 Empire State Building B-25 crash', 'start_paragraph_id': 3, 'start_character': 13, 'end_paragraph_id': 3, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Details.\n'}]}]