Question: What is the population of the largest city in Trego County?

full_context: Document 1: Trego County, Kansas: Trego County (standard abbreviation: TR) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 3,001. Its county seat and largest city is WaKeeney.
Document 2: Chautauqua County, Kansas: Chautauqua County (county code CQ) is a county located in Southeast Kansas. As of the 2010 census, the county population was 3,669. Its county seat and most populous city is Sedan. Chautauqua County is named for Chautauqua County, New York, the birthplace of Edward Jaquins, a Kansas politician who was instrumental in getting the county established.
Document 3: Brown County, Kansas: Brown County (county code BR) is a county located in the northeast portion of the U.S. state of Kansas. As of the 2010 census, the county population was 9,984. Its county seat and most populous city is Hiawatha. Brown County is the location of the Kickapoo Indian Reservation of Kansas, the majority of the Sac and Fox Reservation and the majority of the Iowa Reservation of Kansas and Nebraska.
Document 4: Kansas City, Kansas: Kansas City is the third-largest city in the state of Kansas, the county seat of Wyandotte County, and the third-largest city of the Kansas City metropolitan area. Kansas City, Kansas is abbreviated as "KCK" to differentiate it from Kansas City, Missouri. It is part of a consolidated city-county government known as the "Unified Government". Wyandotte County also includes the independent cities of Bonner Springs and Edwardsville. As of the 2010 census, the city had a population of 145,786 residents. It is situated at Kaw Point, which is the junction of the Missouri and Kansas rivers.
Document 5: Sedgwick County, Kansas: Sedgwick County (county code: SG) is a county located in the U.S. state of Kansas. As of the 2010 census, the population was 498,365, making it the second-most populous county in Kansas. The county seat is Wichita, the most populous city in the state.
Document 6: Wyandotte County, Kansas: Wyandotte County ( ; county code WY) is a county located in the U.S. state of Kansas. As of the 2010 census, the population was 157,505, making it the fourth-most populous county in Kansas. Its county seat and most populous city is Kansas City, with which it shares a unified government. Wyandotte County lies immediately west of Kansas City, Missouri.
Document 7: Kickapoo Tribal Center, Kansas: Kickapoo Tribal Center is a census-designated place (CDP) on the Kickapoo Reservation in Brown County, Kansas, United States. The population was 194 at the 2010 census, making it the most populous location within the reservation.
Document 8: Collyer, Kansas: Collyer is a city in Trego County, Kansas, United States. As of the 2010 census, the city population was 109.
Document 9: Barber County, Kansas: Barber County (county code BA) is a county located in the south-central portion of the U.S. state of Kansas. As of the 2010 census, the county population was 4,861. Its county seat and most populous city is Medicine Lodge. It was named for Thomas Barber, an abolitionist who was killed in Douglas County in 1855 during the Wakarusa War.
Document 10: Leavenworth, Kansas: Leavenworth is the largest city in and the county seat of Leavenworth County, Kansas, United States. As of the 2010 census, the city population was 35,251. Located on the west bank of the Missouri River 25 mi northwest of Kansas City, Missouri, it is part of the Kansas City metropolitan area.
Document 11: WaKeeney, Kansas: WaKeeney is a city in and the county seat of Trego County, Kansas, United States. As of the 2010 census, the city population was 1,862.
Document 12: Sumner County, Kansas: Sumner County (standard abbreviation: SU) is a county located in the U.S. state of Kansas. As of the 2010 census, the population was 24,132. Its county seat is Wellington.
Document 13: Lincoln County, Kansas: Lincoln County (standard abbreviation: LC) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 3,241. The largest city and county seat is Lincoln Center.
Document 14: Lawrence, Kansas: Lawrence is the county seat of Douglas County and sixth largest city in Kansas. It is located in the northeastern sector of the state, next to Interstate 70, between the Kansas and Wakarusa Rivers. As of the 2010 census, the city's population was 87,643. Lawrence is a college town and the home to the University of Kansas and Haskell Indian Nations University.
Document 15: Pottawatomie County, Kansas: Pottawatomie County (standard abbreviation: PT) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 21,604. The county seat is Westmoreland. The county takes its name from the Potawatomi tribe of Native Americans.
ground_truth: 1,862