Question: who sang the song the man who shot liberty valance
[{'answer': 'Gene Pitney', 'provenance': [{'wikipedia_id': '51988339', 'title': '(The Man Who Shot) Liberty Valance', 'start_paragraph_id': 1, 'start_character': 110, 'end_paragraph_id': 1, 'end_character': 121, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51988339', 'title': '(The Man Who Shot) Liberty Valance', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 301, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5864150686507001263}, 'section': 'Section::::Abstract.'}]}]