Question: who played lead guitar on the beatles song while my guitar gently weeps
[{'answer': 'Eric Clapton', 'provenance': [{'wikipedia_id': '921672', 'title': 'While My Guitar Gently Weeps', 'start_paragraph_id': 1, 'start_character': 541, 'end_paragraph_id': 1, 'end_character': 553, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '921672', 'title': 'While My Guitar Gently Weeps', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 504, 'bleu_score': 0.5191333286264971, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4710797003395638817}, 'section': 'Section::::Abstract.'}]}]