Question: Pfeifer is an unincorporated community in Freedom Township, Ellis County, a county located in the U.S. state of Kansas, in which country?

full_context: Document 1: Johnson County, Kansas: Johnson County (county code JO) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 544,179, making it the most populous county in Kansas. Its county seat is Olathe, and its most populous city is Overland Park.
Document 2: 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 3: 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 4: Pfeifer, Kansas: Pfeifer is an unincorporated community in Freedom Township, Ellis County, Kansas, United States.
Document 5: Peterton, Kansas: Peterton is an unincorporated community in Osage County, Kansas, in the United States.
Document 6: Munjor, Kansas: Munjor is an unincorporated community and census-designated place (CDP) in Wheatland Township, Ellis County, Kansas, United States. As of the 2010 census, the population of the community was 213.
Document 7: Chase County, Kansas: Chase County (county code CS) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 2,790. Its county seat and most populous city is Cottonwood Falls. The center of population of Kansas is located in Chase County, about four miles north of Strong City.
Document 8: Freedom, Indiana: Freedom is an unincorporated community in western Franklin Township, Owen County, in the U.S. state of Indiana. It lies along U.S. Route 231, southwest of the city of Spencer, the county seat of Owen County. Its elevation is 538 feet (164 m), and it is located at (39.2069886, -86.8691740). Although Freedom is unincorporated, it has a post office, with the ZIP code of 47431.
Document 9: Catharine, Kansas: Catharine is an unincorporated community and census-designated place (CDP) in Catherine Township, Ellis County, Kansas, United States. As of the 2010 census, the population of the community was 104.
Document 10: Ellisville, Mississippi: Ellisville is a city in and the first county seat of Jones County, Mississippi, United States. The population was 4,448 at the time of the 2010 census. The Jones County Courthouse is located here, as is much of the county government.
Document 11: 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 12: Ellis County, Kansas: Ellis County (county code EL) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 28,452. Its county seat and most populous city is Hays.
Document 13: 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 14: Lakeside Village, Kansas: Lakeside Village is an unincorporated community in central Jefferson County, Kansas, United States. It is located on the shores of Perry Lake. The community has a town hall despite being unincorporated; it also has a community swimming pool.
Document 15: Allen County, Kansas: Allen County (county code AL) is a county located in southeast portion of the U.S. state of Kansas. It is 504 square miles, or 322,560 acres in size. As of the 2010 census, the population was 13,371. Its county seat and most populous city is Iola.
ground_truth: United States