Question: who sang the songs for the five heartbeats
[{'answer': 'The Dells', 'provenance': [{'wikipedia_id': '1625009', 'title': 'The Five Heartbeats', 'start_paragraph_id': 1, 'start_character': 415, 'end_paragraph_id': 1, 'end_character': 424, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1625009', 'title': 'The Five Heartbeats', 'start_paragraph_id': 40, 'start_character': 0, 'end_paragraph_id': 40, 'end_character': 385, 'bleu_score': 0.9699161750394991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17278254983055488294}, 'section': 'Section::::Production.:Promotion.\n'}]}]