Question: who was the actor who played the banjo in deliverance
[{'answer': 'Billy Redden', 'provenance': [{'wikipedia_id': '2198410', 'title': 'Billy Redden', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Ronnie Cox'}, {'provenance': [{'wikipedia_id': '2198410', 'title': 'Billy Redden', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 354, 'bleu_score': 0.8223797876262021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2020880095886815949}, 'section': 'Section::::Abstract.'}]}]