Question: when did o brother where art thou take place
[{'answer': '1937', 'provenance': [{'wikipedia_id': '22216', 'title': 'O Brother, Where Art Thou?', 'start_paragraph_id': 2, 'start_character': 19, 'end_paragraph_id': 2, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '22216', 'title': 'O Brother, Where Art Thou?', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 424, 'bleu_score': 0.917338103367703, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11018271363538528277}, 'section': 'Section::::Abstract.'}]}]