Question: when did captain america the first avenger come out
[{'answer': 'July 22 , 2011', 'provenance': [{'wikipedia_id': '26999426', 'title': 'Captain America: The First Avenger', 'start_paragraph_id': 59, 'start_character': 47, 'end_paragraph_id': 59, 'end_character': 61, 'bleu_score': 1.0, 'section': 'Section::::Reception.:Box office.\n'}]}]