Question: who sang the song you keep me hanging on
[{'answer': 'the Supremes', 'provenance': [{'wikipedia_id': '1236851', 'title': "You Keep Me Hangin' On", 'start_paragraph_id': 1, 'start_character': 179, 'end_paragraph_id': 1, 'end_character': 191, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1236851', 'title': "You Keep Me Hangin' On", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 773, 'bleu_score': 0.9861583350689591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17761997093079520952}, 'section': 'Section::::Abstract.'}]}]