Question: when did the us have its first standing army
[{'answer': '1791'}, {'provenance': [{'wikipedia_id': '21001269', 'title': 'History of the United States Army', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 503, 'bleu_score': 0.9537493104947621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14063473111701830487}, 'section': 'Section::::Early national period (1783–1812).\n'}]}]