Question: when did mamma mia the movie come out
[{'answer': '- 18 )', 'provenance': [{'wikipedia_id': '8425661', 'title': 'Mamma Mia! (film)', 'start_paragraph_id': 2, 'start_character': 480, 'end_paragraph_id': 2, 'end_character': 484, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]