Question: when was the secret life of walter mitty written
[{'answer': '1939', 'provenance': [{'wikipedia_id': '1090481', 'title': 'The Secret Life of Walter Mitty', 'start_paragraph_id': 1, 'start_character': 35, 'end_paragraph_id': 1, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1090481', 'title': 'The Secret Life of Walter Mitty', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 799, 'bleu_score': 0.941883274763583, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4100924622992577780}, 'section': 'Section::::Abstract.'}]}]