Question: when did willie wonka and the chocolate factory come out
[{'answer': '1971', 'provenance': [{'wikipedia_id': '174560', 'title': 'Willy Wonka & the Chocolate Factory', 'start_paragraph_id': 1, 'start_character': 41, 'end_paragraph_id': 1, 'end_character': 45, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '174560', 'title': 'Willy Wonka & the Chocolate Factory', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 556, 'bleu_score': 0.9352076177156141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16757273590182202060}, 'section': 'Section::::Abstract.'}]}]