Question: who sings let it rock let it roll
[{'answer': 'Mel McDaniel', 'provenance': [{'wikipedia_id': '31988826', 'title': 'Let It Roll (Let It Rock)', 'start_paragraph_id': 1, 'start_character': 107, 'end_paragraph_id': 1, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31988826', 'title': 'Let It Roll (Let It Rock)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 351, 'bleu_score': 0.968982777549629, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11265877921590679215}, 'section': 'Section::::Abstract.'}]}]