Question: what branch of the military is captain america in
[{'answer': 'U.S. Army', 'provenance': [{'wikipedia_id': '7729', 'title': 'Captain America', 'start_paragraph_id': 41, 'start_character': 146, 'end_paragraph_id': 41, 'end_character': 155, 'bleu_score': 1.0, 'section': 'Section::::Fictional character biography.:20th century.:1940s.\n'}]}]