Question: who wrote the song heartache on the dance floor
[{'answer': 'Bart Butler', 'provenance': [{'wikipedia_id': '50120365', 'title': 'Heartache on the Dance Floor', 'start_paragraph_id': 1, 'start_character': 237, 'end_paragraph_id': 1, 'end_character': 248, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Brice Long', 'provenance': [{'wikipedia_id': '50120365', 'title': 'Heartache on the Dance Floor', 'start_paragraph_id': 1, 'start_character': 253, 'end_paragraph_id': 1, 'end_character': 263, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Pardi', 'provenance': [{'wikipedia_id': '50120365', 'title': 'Heartache on the Dance Floor', 'start_paragraph_id': 1, 'start_character': 87, 'end_paragraph_id': 1, 'end_character': 92, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '50120365', 'title': 'Heartache on the Dance Floor', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 263, 'bleu_score': 0.957870874785216, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6823575503109317083}, 'section': 'Section::::Abstract.'}]}]