Question: when did the movie coal miner's daughter come out
[{'answer': 'March 7 , 1980', 'provenance': [{'wikipedia_id': '106337', 'title': "Coal Miner's Daughter (film)", 'start_paragraph_id': 46, 'start_character': 74, 'end_paragraph_id': 46, 'end_character': 88, 'bleu_score': 1.0, 'section': 'Section::::Soundtrack.\n'}]}]