Question: when was the last time the navy went to war
[{'answer': 'the ongoing War on Terror', 'provenance': [{'wikipedia_id': '274942', 'title': 'History of the United States Navy', 'start_paragraph_id': 124, 'start_character': 352, 'end_paragraph_id': 124, 'end_character': 377, 'bleu_score': 1.0, 'section': 'Section::::Worldwide expansion.:Post–Cold War (1991–present).\n'}]}, {'provenance': [{'wikipedia_id': '274942', 'title': 'History of the United States Navy', 'start_paragraph_id': 124, 'start_character': 0, 'end_paragraph_id': 124, 'end_character': 692, 'bleu_score': 0.9235573713108671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12212556822169922382}, 'section': 'Section::::Worldwide expansion.:Post–Cold War (1991–present).\n'}]}]