Question: The 41st Air Refueling Squadron was last assigned to a group at an Air Force base opened in what year?
Context: The 712th Expeditionary Air Refueling Squadron is an inactive United States Air Force unit.  It was last assigned to the 19th Operations Group at Robins Air Force Base, Georgia, where it was inactivated on 1 July 1996.  In February 2001, the squadron was converted to provisional status as the 712th Expeditionary Air Refueling Squadron. The 41st Air Refueling Squadron is an inactive United States Air Force unit.  It was last assigned to the 380th Operations Group at Griffiss Air Force Base, New York, where it was inactivated on 15 February 1993. The 421st Air Refueling Squadron is an inactive United States Air Force unit.  It was last assigned to the 41st Air Division at Yokota Air Base, Japan, where it was inactivated on 18 February 1965. Griffiss Air Force Base is a former United States Air Force installation, located in Rome, New York, about 15 miles (24 km) northwest of Utica in central New York state.  Missions at Griffiss AFB included fighter interceptors, electronic research, installation, and support activities, aerial refueling, and bombers. Opened in 1942, the base closed pursuant to BRAC action in 1995 and its airfield is now Griffiss International Airport, owned by Oneida County.  In November 1984 the site was added to the National Priorities List because hazardous chemicals were found in soil and ground water.  Solvents, lead and polychlorinated biphenyls (PCBs) had been disposed in landfills and dry wells The 506th Air Refueling Squadron is an inactive United States Air Force unit.  It was last assigned to the 42d Air Division at Bergstrom Air Force Base, Texas where it was inactivated on 1 July 1957 and its personnel and equipment transferred to the 92d Air Refueling Squadron. The 99th Air Refueling Squadron is part of the 6th Air Mobility Wing at MacDill Air Force Base, Florida, but is stationed at Birmingham Air National Guard Base, Alabama.  It is an Active Associate Unit, an active duty component attached to the Alabama Air National Guard's 117th Air Refueling Wing.  The 99th Air Refueling Squadron works with, supports and flies the 117th Air Refueling Wing's Boeing KC-135R Stratotanker aircraft. The 321st Air Refueling Squadron is an inactive United States Air Force unit.  It was last assigned to the 301st Bombardment Wing at Lockbourne Air Force Base, Ohio, where it was inactivated on 15 March 1965. The 63d Air Refueling Squadron (63 ARS) is a United States Air Force Reserve squadron, assigned to the 927th Operations Group, stationed at MacDill Air Force Base, Florida.  It is a corollary unit of the active duty 91st Air Refueling Squadron, 6th Air Mobility Wing (6 AMW). The 301st Air Refueling Squadron is an inactive United States Air Force (USAF) unit.  It was last assigned to the 301st Air Refueling Wing at Rickenbacker Air Force Base, Ohio, where it was inactivated on 31 December 1975.  In 1985 the 301st was consolidated with the World War II 301st Transport Squadron and 322d Transport Squadron.  The squadron has not been active since consolidation. The 64th Air Refueling Squadron (64 ARS) is a United States Air Force air-refueling squadron that is part of the 22d Air Refueling Wing's 22d Operations Group at McConnell Air Force Base in Kansas.  Through the Air Force's Total Force Initiative, the 64th is operationally assigned to the 157th Air Refueling Wing at Pease Air National Guard Base in New Hampshire.
Answer: 1942