Question: The 304th Sustainment Brigade is headquartered at the home to the Air Force Reserve Command's 4th Air Force (4 AF) Headquarters and the host 452d Air Mobility Wing which was also a Strategic Air Command base during the Cold War for about how many years?
{'answer': '50', 'supporting_facts': [['304th Sustainment Brigade (United States)', 0], ['304th Sustainment Brigade (United States)', 1], ['March Air Reserve Base', 1], ['March Air Reserve Base', 3]]}