Question: who wrote the song desperados waiting for a train
[{'answer': 'Guy Clark', 'provenance': [{'wikipedia_id': '35805282', 'title': 'Desperados Waiting for a Train', 'start_paragraph_id': 1, 'start_character': 54, 'end_paragraph_id': 1, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '35805282', 'title': 'Desperados Waiting for a Train', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 542, 'bleu_score': 0.979054689945215, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10172224448988410338}, 'section': 'Section::::Abstract.'}]}]