Question: who played carl perkins in walk the line
[{'answer': 'Johnny Holiday', 'provenance': [{'wikipedia_id': '1641890', 'title': 'Walk the Line', 'start_paragraph_id': 27, 'start_character': 12, 'end_paragraph_id': 27, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '1641890', 'title': 'Walk the Line', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 42, 'bleu_score': 0.6147881529512641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7017465725691881196}, 'section': 'Section::::Cast.\n'}]}]