Question: In which county is John Walter Farmstead located?

full_context: Document 1: Sally Watson House: Sally Watson House is a historic home located in the Germantown neighborhood of Philadelphia, Pennsylvania. It was designed by architect Wilson Eyre and built in 1889. It is a three-story, rubble schist and shingle dwelling in the Shingle style. It has a gambrel roof and measures approximately 43-feet square.
Document 2: Phineas Pemberton House: Phineas Pemberton House, also known as the Bolton Mansion, is a historic home located in Bristol Township, Levittown, Bucks County, Pennsylvania. It consists of four connected structures built between 1687 and 1790. The original house was built in 1687, and is now the rear wing. It is a two-story, fieldstone structure with brick chimneys. The main section was built in 1790, and is a two-story, four-bay, fieldstone structure in the Georgian style. It has a gambrel roof. The house is owned and maintained by the Friends of Bolton Mansion. It is open as a historic house museum.
Document 3: Washington Township, Clermont County, Ohio: Washington Township is one of the fourteen townships of Clermont County, Ohio, United States. The 2010 census reported 2,278 people living in the township, 1,993 of whom were in the unincorporated portions of the township.
Document 4: Washington Township, Berks County, Pennsylvania: Washington Township is a township in eastern Berks County, Pennsylvania, United States. The population was 3,810 at the 2010 census.
Document 5: John and Sarah Sheffield House: The John and Sarah Sheffield House, also known as Paradise Springs Farm, in southeast Portland in the U.S. state of Oregon, is a two-story dwelling listed on the National Register of Historic Places. Built in 1866 as a farm house, it was added to the register in 1991. It is one of the oldest remaining homes in its neighborhood.
Document 6: Washington Township, Warren County, Ohio: Washington Township is one of the eleven townships of Warren County, Ohio, United States. Located in the east-central part of the county, it is the only one of the eleven that does not contain a municipality. The population in 2000 was 1,855, up from 1,354 in 1990, the second smallest population of the eleven.
Document 7: Applewood Farm: Applewood Farm is a farmstead in Ledyard, Connecticut, United States. Constructed in 1826 by Russel Gallup, the farmhouse was built with a colonial center chimney design with Federal style details that has been modernized to the early 20th century without significantly changing the floor plan. Named after the apple orchards planted by Russel Gallup, Applewood Farm developed significantly under the ownership of Everett Gallup, the last member of the family to own the property. The property was later owned by Arlene Meyer Cohen and a 40-acre parcel was sold off in November 1984. After the Betz family became the owners it was added to the National Register of Historic Places and operated as a bed and breakfast through the 1990s. In 1987, the property included five contributory structures, the farmhouse, corn crib, barn, silo and chicken coop. The property also has one non-contributing structure, a machinery shed from the 1960s.
Document 8: John Walter Farmstead: John Walter Farmstead, also known as Lengauer House, is a historic home located in Washington Township, Westmoreland County, Pennsylvania. The house was built in 1848, and is a two-story, "L"-shaped red brick dwelling, five bays wide in the Greek Revival style. It has a low-pitched, slate covered gable roof. The front facade has a three bay, hipped roof porch. Associated with the house is a contributing bank barn, built about 1846, and spring house, built in 1912.
Document 9: Routzahn-Miller Farmstead: The Routzahn-Miller Farmstead is a historic home and farm complex located at Middletown, Frederick County, Maryland, United States. It consists of a Federal style-influenced brick house and smokehouse, both built about 1825; a later frame out-kitchen / washhouse; a standard Pennsylvania barn; a 20th-century dairy barn and milk house; and a 20th-century equipment shed. The Pennsylvania barn was probably built in the late 19th century and was recently rehabilitated for use as a preschool. The complex is located on a parcel on the east flank of South Mountain. It is representative example of a type of domestic and agricultural grouping which characterized the rural mid-Maryland region from the early 19th century through World War II era.
Document 10: George Bradshaw House and Joshua Salisbury/George Bradshaw Barn: The George Bradshaw House and Joshua Salisbury/George Bradshaw Barn in Wellsville, Utah was listed on the National Register of Historic Places in 1982. The George Bradshaw House is significant as a rare example of Second Empire architecture in any rural area of Utah. The listing also includes a historic stone barn on the property, dating to approximately 1875.
Document 11: Washington Township, Clinton County, Ohio: Washington Township is one of the thirteen townships of Clinton County, Ohio, United States. The population as of the 2010 census was 2,130, up from 1,895 in 2000 and 1,475 in 1990.
Document 12: Washington Township, Henry County, Ohio: Washington Township is one of the thirteen townships of Henry County, Ohio, United States. As of the 2010 census the population was 1,912, of whom 1,794 lived in the unincorporated portion of the township.
Document 13: Cunningham House and Outbuildings: Cunningham House and Outbuildings, also known as Cunningham Farm, is a historic home located near Napier, Braxton County, West Virginia. The house dates to the 1830s, and is a two-story, log structure sided with white clapboards. Also located on the property is a food cellar and granary. The buildings are representative of traditional central West Virginia subsistence farming techniques. The site was purchased by the Army Corps of Engineers during the development of Burnsville Lake, and is administered as part of the Bulltown Historic Area.
Document 14: Washington Township, Parke County, Indiana: Washington Township is one of thirteen townships in Parke County, Indiana, United States. As of the 2010 census, its population was 1,302 and it contained 457 housing units.
Document 15: Washington Township, Jefferson County, Pennsylvania: Washington Township is a township in Jefferson County, Pennsylvania, United States. The population was 1,926 at the 2010 census. It was named for President George Washington.
ground_truth: Berks County
sub_queries: John Walter Farmstead >> located in the administrative territorial entity Answer: Washington Township
Washington Township >> located in the administrative territorial entity Answer: Berks County