Question: when did lynyrd skynyrd's plane crash happen
[{'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': 13765927400997130570}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18713', 'title': 'Lynyrd Skynyrd', 'section': 'Section::::History.:Plane crash (1977).\n', 'start_paragraph_id': 18, 'end_paragraph_id': 18, 'meta': {'evidence_span': ['October 20, 1977', 'Following a performance at the Greenville Memorial Auditorium in Greenville, South Carolina, on October 20, 1977, the band boarded a chartered Convair CV-240 bound for Baton Rouge, Louisiana, where they were scheduled to appear at LSU the following night. After running out of fuel the pilots attempted an emergency landing before crashing in a heavily forested area five miles northeast of Gillsburg, Mississippi. Ronnie Van Zant and Steve Gaines, along with backup singer Cassie Gaines', 'Following a performance at the Greenville Memorial Auditorium in Greenville, South Carolina, on October 20, 1977,']}}]}, {'provenance': [{'wikipedia_id': '22985731', 'title': '1977 Mississippi CV-240 crash', 'section': 'Section::::Crash.\n', 'start_paragraph_id': 10, 'end_paragraph_id': 10, 'meta': {'evidence_span': ['The doomed flight of October 20, 1977 was intended to be the last Lynyrd Skynyrd', 'The doomed flight of October 20, 1977 was intended to be the last Lynyrd Skynyrd would make on the Convair CV-240. "We were flying in a plane that looked like it belonged to the Clampett family," said Pyle, and the band had decided that their status as one of the world\'s top rock acts warranted an upgrade. Afte', 'The doomed flight of October 20, 1977 was intended']}}]}]