Question: who played bass on you're so vain
[{'answer': 'Klaus Voormann', 'provenance': [{'wikipedia_id': '609802', 'title': "You're So Vain", 'start_paragraph_id': 3, 'start_character': 47, 'end_paragraph_id': 3, 'end_character': 61, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '609802', 'title': "You're So Vain", 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 150, 'bleu_score': 0.550671605797467, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17587319162080847982}, 'section': 'Section::::Abstract.'}]}]