Question: who sang the songs in coal miner's daughter movie
[{'answer': "Beverly D'Angelo", 'provenance': [{'wikipedia_id': '106337', 'title': "Coal Miner's Daughter (film)", 'start_paragraph_id': 1, 'start_character': 432, 'end_paragraph_id': 1, 'end_character': 448, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Levon Helm', 'provenance': [{'wikipedia_id': '106337', 'title': "Coal Miner's Daughter (film)", 'start_paragraph_id': 1, 'start_character': 453, 'end_paragraph_id': 1, 'end_character': 463, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Sissy Spacek', 'provenance': [{'wikipedia_id': '106337', 'title': "Coal Miner's Daughter (film)", 'start_paragraph_id': 1, 'start_character': 393, 'end_paragraph_id': 1, 'end_character': 405, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'other artists which were not under contract to MCA'}]