Question: when was to kill a mocking bird based
[{'answer': '1933 -- 35'}, {'provenance': [{'wikipedia_id': '73408', 'title': 'To Kill a Mockingbird', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 1087, 'bleu_score': 0.9107991845377921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 550415043457780600}, 'section': 'Section::::Plot summary.\n'}]}]