Question: who sang the original you keep me hanging on
[{'answer': 'The Supremes', 'provenance': [{'wikipedia_id': '1236851', 'title': "You Keep Me Hangin' On", 'start_paragraph_id': 3, 'start_character': 11, 'end_paragraph_id': 3, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]