Question: when was charlie and the chocolate factory written
[{'answer': '1964', 'provenance': [{'wikipedia_id': '57766', 'title': 'Charlie and the Chocolate Factory', 'start_paragraph_id': 1, 'start_character': 39, 'end_paragraph_id': 1, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '57766', 'title': 'Charlie and the Chocolate Factory', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 214, 'bleu_score': 0.9419661180380051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12763410739667491158}, 'section': 'Section::::Abstract.'}]}]