Question: when did the first captain america movie come out
[{'answer': 'July 19 , 2011', 'provenance': [{'wikipedia_id': '26999426', 'title': 'Captain America: The First Avenger', 'start_paragraph_id': 50, 'start_character': 71, 'end_paragraph_id': 50, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Release.:Theatrical.\n'}]}]