Question: What was the population of Osage County, Kansas in 2010?

full_context: Document 1: Osage City, Kansas: Osage City is a city in Osage County, Kansas, United States. As of the 2010 census, the city population was 2,943.
Document 2: Osage State Fishing Lake: Osage State Fishing Lake is located in northern Osage County, Kansas. It is a mile east of US 75. Scranton, Kansas, is to the lake's northwest and Overbrook, Kansas, is to the northeast. Osage Lake is a freshwater man-made lake, constructed in 1955. It has a surface area of 140 acres, The parkland in which the lake is contained has 366 acreas of land, mostly tall grass prairie with numerous wooded areas. The lake is owned by the State of Kansas.
Document 3: Osage County, Oklahoma: Osage County is the largest county by area in the state of Oklahoma in the United States. Created in 1907 when Oklahoma was admitted as a state, the county is named for and is home to the federally recognized Osage Nation. The county is coextensive with the Osage Nation Reservation, established by treaty in the 19th century when the Osage relocated there from Kansas. The county seat is in Pawhuska, Oklahoma, one of the first three towns established in the county. The total population of the county is 47,987.
Document 4: Osage City Municipal Airport: Osage City Municipal Airport (FAA LID: 53K) is a city-owned public-use airport located one nautical mile (1.6 km) east of the central business district of Osage City, a city in Osage County, Kansas, United States.
Document 5: Osage County, Missouri: Osage County is a county in the central part of the U.S. state of Missouri. As of the 2010 census, the population was 13,878. Its county seat is Linn. The county was organized January 29, 1841, and named from the Osage River.
Document 6: Peterton, Kansas: Peterton is an unincorporated community in Osage County, Kansas, in the United States.
Document 7: Susie Peters: Susie Peters (Kiowa Name: Kom-tah-gya) was an American preservationist and matron at the Anadarko Agency, who worked to promote Kiowa artists. Born to white parents in Tennessee, she moved to Indian Territory with her family prior to Oklahoma statehood. While working as a matron for the Indian Agency, she discovered the talent of the young artists who would become known as the Kiowa Five and introduced them to Oscar Jacobson, director of the University of Oklahoma's art department. She was honored by the National Hall of Fame for Famous American Indians and both adopted by the tribe and given a Kiowa name in 1954. In 1963, the Anadarko Philomathic Club created an annual art award in her name. She was inducted into the Oklahoma Women's Hall of Fame in its inaugural year, 1982.
Document 8: Southeast Kansas: Southeast Kansas is a region of the U.S. state of Kansas. It can be roughly defined by Woodson County in the northwest, Bourbon County in the northeast, Cherokee County in the southeast, and Montgomery County in the southwest. Geographically it is dominated by a broad rolling landscape located between the Flint Hills to the west and includes the Ozarks to the southeast. Some notable towns there include Pittsburg, Parsons, Coffeyville, Independence, Chanute, Fort Scott, and Iola. The region has a land area of 13,624.13 km² (5,260.30 sq mi) and a 2000 census population of 180,815 inhabitants. It has 6.43% of the state's land area and 6.726% of its population. It is dominated by a broad rolling landscape that includes the Ozarks. It receives more precipitation than any other part of Kansas. Southeast Kansas is located in the tallgrass prairie ecosystem of North America. Originally inhabited by several Native American tribes, frontier towns largely dependent on cattle ranching, and mining, were wracked by violence over the issue of slavery both before and during the American Civil War. Southeast Kansas offers one of the premier reconstructions of early life in the United States Army at Fort Scott National Historic Site.
Document 9: Osage, Oklahoma: Osage is a town in Osage County, Oklahoma, United States. Also known as Osage City, it lies within the Osage Reservation on the shore of Lake Keystone. The population was 156 at the 2010 census, down 17 percent from 188 at the 2000 census.
Document 10: Osage Hills: The Osage Hills is a hilly area in Oklahoma, commonly known as "The Osage". The name refers to the broad rolling hills and rolling tallgrass prairie and Cross Timbers encompassing Osage County and surrounding areas, including portions of Mayes, Tulsa, Washington and Kay Counties. The Osage is the southern extension of the Flint Hills of Kansas.
Document 11: Osawatomie, Kansas: Osawatomie is a city in Miami County, Kansas, United States, 61 mi southwest of Kansas City. As of the 2010 census, the city population was 4,447. It derives its name from two streams nearby, the Osage and Potawatomie.
Document 12: Petran: Petran is a village and a former municipality in the Gjirokastër County, southern Albania. At the 2015 local government reform it became a subdivision of the municipality Përmet. The population at the 2011 census was 1,622. The municipal unit consists of the villages Petran, Leshnicë, Leusë, Lipë, Qilarishtë, Badilonjë, Benjë-Novoselë, Delvinë, Kaludh, Lupckë, Gjinakar (Gjinkar), Ogdunan, Isgar, Lipivan-Trabozishtë, Tremisht and Bodar. There are a couple of restaurants that look out over the Vjosa river.
Document 13: 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.
Document 14: Osage County, Kansas: Osage County (county code OS) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 16,295. Its county seat is Lyndon, and its most populous city is Osage City. The county was originally organized in 1855 as Weller County, and was renamed in 1859 after the Osage River that runs through it, which is itself named for the Osage Native American Tribe.
Document 15: 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.
ground_truth: 16,295