Question: who sings searching for a heart of gold
[{'answer': 'Neil Young', 'provenance': [{'wikipedia_id': '2038355', 'title': 'Heart of Gold (Neil Young song)', 'start_paragraph_id': 0, 'start_character': 15, 'end_paragraph_id': 0, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2038355', 'title': 'Heart of Gold (Neil Young song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 476, 'bleu_score': 0.978606533029418, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8062253827948444116}, 'section': 'Section::::Abstract.'}]}]