Question: who sang you've lost that loving feeling
[{'answer': 'the Righteous Brothers', 'provenance': [{'wikipedia_id': '2500059', 'title': "You've Lost That Lovin' Feelin'", 'start_paragraph_id': 1, 'start_character': 124, 'end_paragraph_id': 1, 'end_character': 146, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2500059', 'title': "You've Lost That Lovin' Feelin'", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 450, 'bleu_score': 0.9304844600065421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5228802574956928160}, 'section': 'Section::::Abstract.'}]}]