Question: who sang ain't too proud to beg
[{'answer': 'The Temptations', 'provenance': [{'wikipedia_id': '1417424', 'title': "Ain't Too Proud to Beg", 'start_paragraph_id': 1, 'start_character': 526, 'end_paragraph_id': 1, 'end_character': 541, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]