Question: who was the original singer of wild horses
[{'answer': 'Rolling Stones', 'provenance': [{'wikipedia_id': '4785963', 'title': 'Wild Horses (The Rolling Stones song)', 'start_paragraph_id': 0, 'start_character': 17, 'end_paragraph_id': 0, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4785963', 'title': 'Wild Horses (The Rolling Stones song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 218, 'bleu_score': 0.9493253852526031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 571627045774630575}, 'section': 'Section::::Abstract.'}]}]