Question: when did mamma mia film first come out
[{'answer': 'June 30 , 2008', 'provenance': [{'wikipedia_id': '8425661', 'title': 'Mamma Mia! (film)', 'start_paragraph_id': 2, 'start_character': 196, 'end_paragraph_id': 2, 'end_character': 212, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8425661', 'title': 'Mamma Mia! (film)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 953, 'bleu_score': 0.943186868180333, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15566108515788547484}, 'section': 'Section::::Abstract.'}]}]