Question: when was the plane crash that killed lynyrd skynyrd
[{'answer': 'October 20 , 1977', 'provenance': [{'wikipedia_id': '22985731', 'title': '1977 Mississippi CV-240 crash', 'start_paragraph_id': 10, 'start_character': 21, 'end_paragraph_id': 10, 'end_character': 41, 'bleu_score': 1.0, 'section': 'Section::::Crash.\n'}]}, {'provenance': [{'wikipedia_id': '22985731', 'title': '1977 Mississippi CV-240 crash', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 301, 'bleu_score': 0.6926454165507401, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14711664258568082115}, 'section': 'Section::::Abstract.'}]}]