Question: when was willy wonka and the chocolate factory released
[{'answer': 'June 30 , 1971', 'provenance': [{'wikipedia_id': '174560', 'title': 'Willy Wonka & the Chocolate Factory', 'start_paragraph_id': 27, 'start_character': 30, 'end_paragraph_id': 27, 'end_character': 44, 'bleu_score': 1.0, 'section': 'Section::::Reception.\n'}]}, {'provenance': [{'wikipedia_id': '174560', 'title': 'Willy Wonka & the Chocolate Factory', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1094, 'bleu_score': 0.747311428226008, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17488796636311590452}, 'section': 'Section::::Abstract.'}]}]