Question: who played bluegrass on the andy griffith show
[{'answer': 'The Dillards', 'provenance': [{'wikipedia_id': '1721801', 'title': 'The Dillards', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1721801', 'title': 'The Dillards', 'start_paragraph_id': 43, 'start_character': 0, 'end_paragraph_id': 43, 'end_character': 842, 'bleu_score': 0.985662154730604, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4954730755911381156}, 'section': 'Section::::"The Andy Griffith Show".\n'}]}]