Question: who plays saxophone on can't you hear me knocking
[{'answer': 'Bobby Keys', 'provenance': [{'wikipedia_id': '6140803', 'title': "Can't You Hear Me Knocking", 'start_paragraph_id': 1, 'start_character': 332, 'end_paragraph_id': 1, 'end_character': 342, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6140803', 'title': "Can't You Hear Me Knocking", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 577, 'bleu_score': 0.9214248996766221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2790347733853655562}, 'section': 'Section::::Abstract.'}]}]