Question: who wrote the song my heroes have always been cowboys
[{'answer': 'Sharon Vaughn', 'provenance': [{'wikipedia_id': '25633308', 'title': 'My Heroes Have Always Been Cowboys (song)', 'start_paragraph_id': 1, 'start_character': 269, 'end_paragraph_id': 1, 'end_character': 282, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]