Question: when did johnny cash write a boy named sue
[{'answer': '1969', 'provenance': [{'wikipedia_id': '316851', 'title': 'A Boy Named Sue', 'start_paragraph_id': 1, 'start_character': 162, 'end_paragraph_id': 1, 'end_character': 166, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '316851', 'title': 'A Boy Named Sue', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 774, 'bleu_score': 0.985764216565234, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8674960979952647022}, 'section': 'Section::::Abstract.'}]}]