Question: when did loretta lynn first appear on the grand ole opry
[{'answer': '1960', 'provenance': [{'wikipedia_id': '176316', 'title': 'Loretta Lynn', 'start_paragraph_id': 15, 'start_character': 994, 'end_paragraph_id': 15, 'end_character': 998, 'bleu_score': 1.0, 'section': 'Section::::Path to stardom.\n'}]}, {'provenance': [{'wikipedia_id': '176316', 'title': 'Loretta Lynn', 'start_paragraph_id': 26, 'start_character': 0, 'end_paragraph_id': 26, 'end_character': 540, 'bleu_score': 0.5122269392106701, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13944355791086017980}, 'section': 'Section::::Music career.:1960–1966: Early country success.\n'}]}]