Question: who is the keyboard player for the rolling stones
[{'answer': 'Charles Alfred Leavell', 'provenance': [{'wikipedia_id': '3383180', 'title': 'Chuck Leavell', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3383180', 'title': 'Chuck Leavell', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 619, 'bleu_score': 0.9456135312474161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9289489682171222974}, 'section': 'Section::::Abstract.'}]}]