Question: Columbus, Ohio is located in which county?

full_context: Document 1: Wright-Patterson Air Force Base: Wright-Patterson Air Force Base (WPAFB) (IATA: FFO, ICAO: KFFO, FAA LID: FFO) is a United States Air Force base and census-designated place just east of Dayton, Ohio, in Greene and Montgomery counties. It includes both Wright and Patterson Fields, which were originally Wilbur Wright Field and Fairfield Aviation General Supply Depot. Patterson Field is approximately 10 mi northeast of Dayton; Wright Field is approximately 5 mi northeast of Dayton.
Document 2: 56th Rescue Squadron: The 56th Rescue Squadron is part of the 48th Operations Group, 48th Fighter Wing at RAF Lakenheath, England. It operates HH-60G Pave Hawk helicopters conducting search and rescue missions. It will relocate to Aviano Air Base, Italy starting in 2017.
Document 3: Eddie Rickenbacker: Edward Vernon Rickenbacker (October 8, 1890 – July 23, 1973) was an American fighter ace in World War I and Medal of Honor recipient. With 26 aerial victories, he was America's most successful fighter ace in the war. He was also considered to have won the most awards for valor by an American during the war according to the April 2017 VFW magazine in their special World War I edition.
Document 4: 730th Air Mobility Training Squadron: The 730th Air Mobility Training Squadron is an Air Force reserve unit stationed at Altus Air Force Base, Oklahoma, where it trans airmen on Boeing C-17 Globemaster III, Boeing KC-135 Stratotanker and Boeing KC-46 Pegasus aircraft systems. It is assigned to the 507th Operations Group at Tinker Air Force Base, Oklahoma, but performs its training mission under the direction of the 97th Air Mobility Wing of Air Education and Training Command.
Document 5: 166th Air Refueling Squadron: The 166th Air Refueling Squadron (166 ARS) is a unit of the Ohio Air National Guard 121st Air Refueling Wing located at Rickenbacker Air National Guard Base, Columbus, Ohio. The 166th is equipped with the KC-135R Stratotanker.
Document 6: Rickenbacker International Airport: Rickenbacker International Airport (IATA: LCK, ICAO: KLCK, FAA LID: LCK) is a civil-military public airport 10 mi south of downtown Columbus, near Lockbourne in southern Franklin County, Ohio, United States. The south end of the airport extends into Pickaway County. The base was named for flying ace and Columbus native Eddie Rickenbacker. It is managed by the Columbus Regional Airport Authority, which also operates John Glenn Columbus International Airport and Bolton Field. Rickenbacker International is primarily a cargo airport for the city of Columbus, although since 2012 it has served an increasing number of passenger flights as well as charter carriers.
Document 7: Columbus Regional Airport Authority: Columbus Regional Airport Authority (CRAA) oversees the operations of John Glenn Columbus International Airport, Rickenbacker International Airport and Bolton Field airports in the Columbus, Ohio, area.
Document 8: 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.
Document 9: 136th Civil Engineer Squadron: The 136th Civil Engineer Squadron (136 CES) is a unit of the 136th Airlift Wing, Texas Air National Guard, Texas Military Forces, stationed at Naval Air Station Fort Worth Joint Reserve Base, Fort Worth, Texas. If activated to federal service, the Squadron is gained by the United States Air Force Air Mobility Command.
Document 10: McConnell Air Force Base: McConnell Air Force Base (IATA: IAB, ICAO: KIAB, FAA LID: IAB) is a United States Air Force base located four miles (6 km) southeast of the central business district of Wichita, a city in Sedgwick County, Kansas, United States. The base was named in honor of Wichita brothers Fred and Thomas McConnell, both Air Force pilots and World War II veterans. It is the home of Air Mobility Command's 22d Air Refueling Wing (22 ARW), Air Force Reserve Command's 931st Air Refueling Wing (931 ARW), and the Kansas Air National Guard's 184th Intelligence Wing (184 IW).
Document 11: 917th Air Refueling Squadron: The 917th Air Refueling Squadron is an inactive United States Air Force unit. It was last active as a Geographically Separated Unit at Dyess Air Force Base, Texas, while assigned to the 43d Operations Group at Malmstrom Air Force Base, Montana, where it was inactivated on 1 July 1994.
Document 12: 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).
Document 13: Bakalar Air Force Base: Bakalar Air Force Base is a former U.S. Air Force base located 4.4 mi northeast of Columbus, Indiana. During World War II, the base was known as Atterbury Air Field and Atterbury Army Air Base (named in memory of Brigadier General William Wallace Atterbury), but it was renamed Bakalar Air Force Base in 1954 in honor of First Lieutenant John Edmond Bakalar, USAAF. Established in 1942, the airfield served as a training base for medium-range C-46 Commando and C-47 Skytrain troop carrier planes and glider pilots. It also was used for training B-25 Mitchell and B-26 Marauder bomber crews. Reactivated during the Cold War, it was used as an Air Force Reserve training base for troop carrier, tactical airlift, and special operations flying units. The military base was closed in 1970. The present-day facility operates as the Columbus, Indiana, municipal airport.
Document 14: Wright-Patterson Air Force Base: Wright-Patterson Air Force Base (WPAFB) (IATA: FFO, ICAO: KFFO, FAA LID: FFO) is a United States Air Force base and census-designated place just east of Dayton, Ohio, in Greene and Montgomery counties. It includes both Wright and Patterson Fields, which were originally Wilbur Wright Field and Fairfield Aviation General Supply Depot. Patterson Field is approximately 10 mi northeast of Dayton; Wright Field is approximately 5 mi northeast of Dayton.
Document 15: Rickenbacker International Airport: Rickenbacker International Airport (IATA: LCK, ICAO: KLCK, FAA LID: LCK) is a civil-military public airport 10 mi south of downtown Columbus, near Lockbourne in southern Franklin County, Ohio, United States. The south end of the airport extends into Pickaway County. The base was named for flying ace and Columbus native Eddie Rickenbacker. It is managed by the Columbus Regional Airport Authority, which also operates John Glenn Columbus International Airport and Bolton Field. Rickenbacker International is primarily a cargo airport for the city of Columbus, although since 2012 it has served an increasing number of passenger flights as well as charter carriers.
ground_truth: Franklin County