Question: when was the first nuclear bomb set off
[{'answer': 'July 16 , 1945', 'provenance': [{'wikipedia_id': '60033', 'title': 'Trinity (nuclear test)', 'start_paragraph_id': 96, 'start_character': 1096, 'end_paragraph_id': 96, 'end_character': 1110, 'bleu_score': 1.0, 'section': 'Section::::Site today.\n'}]}, {'provenance': [{'wikipedia_id': '60033', 'title': 'Trinity (nuclear test)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 641, 'bleu_score': 0.9051631587465061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12323393424123498391}, 'section': 'Section::::Abstract.'}]}]