Question: who sang the country and western song no charge
[{'answer': 'Melba Montgomery', 'provenance': [{'wikipedia_id': '7770709', 'title': 'No Charge', 'start_paragraph_id': 1, 'start_character': 129, 'end_paragraph_id': 1, 'end_character': 145, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7770709', 'title': 'No Charge', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 342, 'bleu_score': 0.9699161750394991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7991521342618980025}, 'section': 'Section::::Abstract.'}]}]