Question: what brand of m4 does the military use
[{'answer': 'Colt Firearms', 'provenance': [{'wikipedia_id': '321957', 'title': 'M4 carbine', 'start_paragraph_id': 13, 'start_character': 69, 'end_paragraph_id': 13, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::History.:Improved M4.\n'}]}, {'provenance': [{'wikipedia_id': '321957', 'title': 'M4 carbine', 'start_paragraph_id': 90, 'start_character': 0, 'end_paragraph_id': 90, 'end_character': 1522, 'bleu_score': 0.9374624964163901, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12657330851968879866}, 'section': 'Section::::Trademark issues.\n'}]}]