Question: In which country is Upland, a West Virginia city in the county sharing a border with Heaton's county?

full_context: Document 1: Apple Grove, McDowell County, West Virginia: Apple Grove is an unincorporated community located in McDowell County, West Virginia, United States. Apple Grove is located along West Virginia Route 80 on the Dry Fork south of Iaeger.
Document 2: Carter's Tavern: Carter's Tavern is a historic inn and tavern located at Paces, Halifax County, Virginia. It dates to the late-18th and early-19th century and consists of a two-story, double-pile, side-hall-plan main frame section and an earlier 1 1/2-story frame wing on the west end. Both the main part and the wing are covered by gable roofs with simple box cornices. The building was thoroughly restored in 1972. Carter's Tavern remained in operation until 1843.
Document 3: Heaton, North Carolina: Heaton is an unincorporated community in Avery County, North Carolina, United States. The community is located along NC 194, centered at the Heaton Bridge, which crosses over the Elk River.
Document 4: Nancy Lincoln Inn: The Nancy Lincoln Inn is a historic building located at the Abraham Lincoln Birthplace National Historic Site in LaRue County, Kentucky, just south of Hodgenville, Kentucky. Despite being on National Park Service property, it is privately owned.
Document 5: Upland, McDowell County, West Virginia: Upland is an unincorporated community in McDowell County, West Virginia, United States. Upland is located on U.S. Route 52 south-southeast of Northfork.
Document 6: Jackson Falls National Register Historic District: The Jackson Falls National Register Historic District encompasses the historic village center of Jackson, New Hampshire. It consists of a cluster of buildings centered on the crossing of Jackson Village Road over the Wildcat River, extending on both sides of the river along Five Mile Circuit Road (aka Black Mountain Road) and Carter Notch Road, both of which are part of New Hampshire Route 16B. Most of the properties in the district were built between the 1860s and the 1930s, and are reflective of the community's growth as a summer resort area. The district was listed on the National Register of Historic Places in 2003.
Document 7: Ashland, West Virginia: Ashland is an unincorporated community located in McDowell County, West Virginia, United States. Located on the headwaters of the North Fork of Elkhorn Creek, it is also the location of the national historic Ashland Company Store and the Ashland Trailhead for the Indian Ridge Trail, a part of the Hatfield McCoy Trail System. It is the birthplace of 1960s soul singer Garnet Mimms.
Document 8: Roaring Creek, North Carolina: Roaring Creek is an unincorporated community in Avery County, North Carolina, United States. The community was named after Roaring Creek, which flows in the area. The community is located along US 19-E, between the communities of Frank and Plumtree.
Document 9: Andrews Geyser: Andrews Geyser is a man-made fountain in Old Fort, North Carolina in McDowell County. The fountain is named for Colonel Alexander Boyd Andrews, a North Carolina native who was the Vice President of the Southern Railway Company and one of the men responsible for the construction of the railroad between Old Fort and Asheville, North Carolina, in the late 19th century. The fountain was constructed in 1885 with a dual purpose: it was a feature of the Round Knob Hotel, and a tribute to the approximately 120 men who died building the railroad through this particularly treacherous stretch of land, that culminates with the crossing of the Eastern Continental Divide through the Swannanoa Tunnel. The fountain was said to be eye-catching for railroad passengers ascending the 13 miles of track and seven tunnels that peaks at the top of Swannanoa Gap because it could be seen several times along the route.
Document 10: Avery Creek, North Carolina: Avery Creek is a census-designated place (CDP) in Buncombe County, North Carolina, United States. The population was 1,950 at the 2010 census. It is part of the Asheville Metropolitan Statistical Area.
Document 11: Maitland, West Virginia: Maitland is an unincorporated community in McDowell County, West Virginia, United States. Maitland is located on U.S. Route 52 east of Welch.
Document 12: Linville Falls Tavern: Linville Falls Tavern, now known as Famous Louise's Rock House Restaurant, is a historic tavern located at Linville Falls, Avery County and McDowell County, North Carolina. It was built in 1936, and is a 1 1/2-story, eight bay, native stone Rustic Revival-style building. It has a hipped roof with dormer and two stone chimneys.
Document 13: Ingalls, North Carolina: Ingalls is an unincorporated community in Avery County, North Carolina, United States. The community is located at the intersection of US 19-E and NC 194. The Avery County Airport (Morrison Field) is located two miles south from Ingalls, towards Spruce Pine.
Document 14: Altamont, North Carolina: Altamont is an unincorporated community in Avery County, North Carolina, United States. The community is located along US 221/NC 194 (Linville Falls Highway), between the town of Crossnore and the community of Linville Falls. Altamont translates to "High Mountain."
Document 15: Superior, West Virginia: Superior is an unincorporated community in McDowell County, West Virginia, United States. Superior is located on U.S. Route 52 east-southeast of Welch.
ground_truth: U.S.
sub_queries: Heaton >> located in the administrative territorial entity Answer: Avery County
Avery County >> shares border with Answer: McDowell County
Upland, McDowell County , West Virginia >> country Answer: U.S.