Question: who sings i should have been a cowboy
[{'answer': 'Toby Keith', 'provenance': [{'wikipedia_id': '12316817', 'title': "Should've Been a Cowboy", 'start_paragraph_id': 1, 'start_character': 90, 'end_paragraph_id': 1, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]