Question: who played harmonica in once upon a time in the west
[{'answer': 'Charles Bronson', 'provenance': [{'wikipedia_id': '284676', 'title': 'Once Upon a Time in the West', 'start_paragraph_id': 1, 'start_character': 214, 'end_paragraph_id': 1, 'end_character': 229, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '284676', 'title': 'Once Upon a Time in the West', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 41, 'bleu_score': 0.5081327481546141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1646613058454821599}, 'section': 'Section::::Cast.\n'}]}]