Question: who played guitar on almost cut my hair
[{'answer': 'David Crosby', 'provenance': [{'wikipedia_id': '52529095', 'title': 'Almost Cut My Hair', 'start_paragraph_id': 2, 'start_character': 177, 'end_paragraph_id': 2, 'end_character': 189, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Neil Young', 'provenance': [{'wikipedia_id': '52529095', 'title': 'Almost Cut My Hair', 'start_paragraph_id': 2, 'start_character': 561, 'end_paragraph_id': 2, 'end_character': 571, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Stephen Stills', 'provenance': [{'wikipedia_id': '52529095', 'title': 'Almost Cut My Hair', 'start_paragraph_id': 9, 'start_character': 12, 'end_paragraph_id': 9, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Personnel.\n'}]}]