Question: when did the first muppet movie come out
[{'answer': 'June 22 , 1979', 'provenance': [{'wikipedia_id': '876728', 'title': 'The Muppet Movie', 'start_paragraph_id': 2, 'start_character': 385, 'end_paragraph_id': 2, 'end_character': 399, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]