Question: who played the cowbell on don't fear the reaper
[{'answer': 'Albert Bouchard', 'provenance': [{'wikipedia_id': '1506853', 'title': "(Don't Fear) The Reaper", 'start_paragraph_id': 8, 'start_character': 185, 'end_paragraph_id': 8, 'end_character': 200, 'bleu_score': 1.0, 'section': 'Section::::Composition and recording.\n'}]}, {'provenance': [{'wikipedia_id': '1506853', 'title': "(Don't Fear) The Reaper", 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 441, 'bleu_score': 0.9385658427564221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1519647917361909885}, 'section': 'Section::::Composition and recording.\n'}]}]