Question: who sang the song old man look at my life
[{'answer': 'Neil Young', 'provenance': [{'wikipedia_id': '1709782', 'title': 'Old Man (song)', 'start_paragraph_id': 1, 'start_character': 45, 'end_paragraph_id': 1, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1709782', 'title': 'Old Man (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 245, 'bleu_score': 0.957870874785216, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5049206939054404247}, 'section': 'Section::::Abstract.'}]}]