Question: In what county was the 160th Air Refueling Group last based?

Context paragraphs:
64th Air Refueling Squadron: 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.

134th Air Refueling Wing: The 134th Air Refueling Wing (134 ARW) is a unit of the Tennessee Air National Guard, stationed at McGhee Tyson Air National Guard Base, Knoxville, Tennessee.  If activated for federal service, the Wing is gained by the United States Air Force Air Mobility Command.  The 134th Air Refueling Wing's KC-135 mission is to provide air refueling and airlift, as directed by the Secretary of Defense.  It has been stationed at McGhee Tyson Airport since December 1957, though the ANG facility at the airport has been redesignated several times.  Their radio callsign is "Soda"

916th Expeditionary Air Refueling Squadron: The 916th Air Refueling Squadron is an inactive United States Air Force unit.  It was last assigned to the 307th Air Refueling Group at Travis Air Force Base, California, where it was inactivated on 31 October 1983.

137th Operations Group: The 137th Air Refueling Group is an associate unit of the Oklahoma Air National Guard stationed at Tinker Air Force Base, Oklahoma.  If activated for federal service, the group is gained by Air Mobility Command.  As of July 2015, the group is in the process of returning to Will Rogers Air National Guard Base and converting from the air refueling to the special operations mission.

99th 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.

160th Air Refueling Group: The 160th Air Refueling Group (160 ARG) is an inactive unit of the Ohio Air National Guard.  It was last stationed at Rickenbacker Air National Guard Base, Columbus, Ohio.  The 160th ARW was inactivated on 1 October 1993.

Rickenbacker Air National Guard Base: Rickenbacker Air National Guard Base (1942–present) is an Air National Guard facility of the Ohio Air National Guard located near Lockbourne in southern Franklin County.  The base was named for the famous early aviator and Columbus native Eddie Rickenbacker.  It is the home of the United States Air Force's 121st Air Refueling Wing (121 ARW), which serves as the host wing and is an Air National Guard (ANG) unit operationally-gained by the Air Mobility Command (AMC).

905th Air Refueling Squadron: The 905th Air Refueling Squadron is an inactive United States Air Force unit.  It was last active as an element of the 319th Air Refueling Wing at Grand Forks Air Force Base, North Dakota, where it operated Boeing KC-135 Stratotanker aircraft.  The squadron was inactivated at the end of 2010 when the 319th wing lost its operational mission and became the 319th Air Base Wing.

310th Air Refueling Squadron: The 310th Expeditionary Air Refueling Flight is a provisional United States Air Force unit.  The flight was last active as the 310th Air Refueling Squadron in October 1994, when it was assigned to the 380th Air Refueling Wing at Plattsburgh Air Force Base.

4505th Air Refueling Wing: The United States Air Force's 4505th Air Refueling Wing (Tactical) was an Air Refueling unit located at Langley AFB, Virginia.  It was established on 1 Jul 1958 at Langley AFB, Virginia.  The 4505th was the only aerial refueling wing in the Tactical Air Command structure.  The wing flew the KB-50J, a derivative of the B-50 nuclear bomber.  The 4505th Air Refueling Wing (Tactical) was discontinued on 8 Oct 1963.

Supporting paragraphs: 160th Air Refueling Group Rickenbacker Air National Guard Base
Answer: Franklin County