Question: Alta, West Virginia, whose county shares a border with the county that contains Green Valley, is in what country?

full_context: Document 1: Green Valley (CDP), Wisconsin: Green Valley is an unincorporated census-designated place located in the town of Green Valley, Shawano County, Wisconsin, United States. Green Valley is east of Shawano. As of the 2010 census, its population was 133.
Document 2: West Virginia Route 76: West Virginia Route 76 is an east–west state highway in northern West Virginia. The western terminus of the route is at U.S. Route 50 in the shadow of Bridgeport's Benedum Airport. The eastern terminus is at U.S. Route 119 and U.S. Route 250 three miles (5 km) north of Philippi.
Document 3: Greenbrier Valley Airport: Greenbrier Valley Airport IATA: LWB ICAO: KLWB FAA LID: LWB Summary Airport type Public Owner Greenbrier County Airport Authority Serves Lewisburg, West Virginia Location Greenbrier County, West Virginia, near Lewisburg and White Sulphur Springs Elevation AMSL 2,301 ft / 701 m Coordinates 37 ° 51 ′ 30 ''N 080 ° 23 ′ 58'' W ﻿ / ﻿ 37.85833 ° N 80.39944 ° W ﻿ / 37.85833; - 80.39944 Coordinates: 37 ° 51 ′ 30 ''N 080 ° 23 ′ 58'' W ﻿ / ﻿ 37.85833 ° N 80.39944 ° W ﻿ / 37.85833; - 80.39944 Website www.gvairport.com Map LWB LWB Show map of West Virginia Show map of the US Show all Location of airport in West Virginia / United States Runways Direction Length Surface ft m 4 / 22 7,003 2,135 Asphalt Statistics (2012) Aircraft operations 23,954 Based aircraft 26 Source: Federal Aviation Administration
Document 4: Meadow Creek, West Virginia: Meadow Creek is an unincorporated community in Summers County, West Virginia, United States. Meadow Creek is located on the New River, southwest of Meadow Bridge and north of Hinton.
Document 5: Greenville, Logan County, West Virginia: Greenville is an unincorporated community in Logan County, West Virginia, United States. Greenville is located along the Guyandotte River south of Man.
Document 6: Greenview, West Virginia: Greenview is a census-designated place in Boone County, West Virginia, United States. Its population was 378 as of the 2010 census.
Document 7: Green Valley, Nicholas County, West Virginia: Green Valley is an unincorporated community in Nicholas County, West Virginia, United States. Green Valley is located along West Virginia Route 20 north of Quinwood.
Document 8: Guyandotte River: The Guyandotte River is a tributary of the Ohio River, approximately 166 mi (267 km) long, in southwestern West Virginia in the United States. It was named after the French term for the Wendat Native Americans. It drains an area of the unglaciated Allegheny Plateau south of the Ohio between the watersheds of the Kanawha River to the northeast and Twelvepole Creek and the Big Sandy River to the southwest. Via the Ohio River, it is part of the Mississippi River watershed.
Document 9: Alta, Fayette County, West Virginia: Alta is an unincorporated community in Fayette County, West Virginia, United States. Alta is located on West Virginia Route 16 and West Virginia Route 39 north of Gauley Bridge.
Document 10: Meadow River: The Meadow River is a tributary of the Gauley River, making its headwaters in Greenbrier County and terminating in Nicholas County of West Virginia. It is named for the grassy meadows wetlands which its upper watershed drains, and from which it springs.
Document 11: Green Valley, Mercer County, West Virginia: Green Valley is an unincorporated community in Mercer County, West Virginia, United States. Green Valley is located along West Virginia Route 123 North-NorthEast of Bluefield.
Document 12: Alta, Greenbrier County, West Virginia: Alta is an unincorporated community in Greenbrier County, West Virginia, United States. Alta is located at the junction of Interstate 64, U.S. Route 60, and West Virginia Route 12 northwest of Lewisburg.
Document 13: Interstate 77 in West Virginia: Interstate 77 Route information Maintained by West Virginia Division of Highways and West Virginia Parkways Authority Length 187.21 mi (301.29 km) Existed November 8, 1954 -- present Major junctions South end I - 77 / US 52 at Virginia state line US 460 near Princeton I ‐ 64 from Beckley to Charleston WV 16 / WV 97 at Beckley US 19 near Beckley US 60 at Charleston I ‐ 79 near Charleston US 33 from Ripley to Ravenswood WV 2 from Ravenswood to Parkersburg US 50 at Parkersburg North end I - 77 at Ohio state line Highway system Interstate Highway System Main Auxiliary Suffixed Business Future West Virginia State Highway System Interstate US State ← WV 76 WV 78 →
Document 14: Cheat River: The Cheat River is a tributary of the Monongahela River in eastern West Virginia and southwestern Pennsylvania in the United States. Via the Ohio River, the Cheat and Monongahela are part of the Mississippi River watershed. Owing to the ruggedness of the surrounding Allegheny Mountains, the Cheat remains largely remote with few settlements or developments along its banks. Its headwaters are in the Cheat-Potomac Ranger District of the Monongahela National Forest.
Document 15: South Branch Wildlife Management Area: The South Branch Wildlife Management Area is of mixed oak-hickory woodlands and pastures in Hampshire and Hardy Counties, West Virginia, USA. The South Branch WMA consists of four separate tracts (McNeill, Bridge, Trough Club, and Sector) along the South Branch Potomac River around and south of the river gorge known as The Trough. It is known throughout the region for its dove, squirrel, deer, and wild turkey hunting. The WMA is owned by the West Virginia Division of Natural Resources.
ground_truth: U.S.
sub_queries: Green Valley >> located in the administrative territorial entity Answer: Nicholas County
Nicholas County >> shares border with Answer: Greenbrier County
Alta, Greenbrier County , West Virginia >> country Answer: U.S.