Question: What region of the country is the state encompassing Luther Yard in?

full_context: Document 1: St. Louis Metro-East Airport: St. Louis Metro-East Airport , also known as Shafer Field, is a public use airport located two miles (3 km) north of the central business district of St. Jacob, in Madison County, Illinois, United States. It is privately owned by Edward B. Shafer.
Document 2: Midwestern United States: The Midwestern United States, also referred to as the American Midwest, Middle West, or simply the Midwest, is one of four geographic regions defined by the United States Census Bureau. It occupies the northern central part of the United States of America. It was officially named the North Central region by the Census Bureau until 1984. It is located between the Northeastern U.S. and the Western U.S., with Canada to its north and the Southern U.S. to its south.
Document 3: Leach Railroad Station, Kentucky: Leach Railroad Station, is an unincorporated community located 3 miles south of Catlettsburg in Boyd County, Kentucky. It was first established in approximately 1882 as a freight and passenger loading facility for the Chatteroi railroad (later Chesapeake and Ohio Railway). The former community of Leech Station is now mostly owned by Marathon Oil, which operates one of its seven oil refineries there. Marathon bought the large refinery at Leech Station from Ashland, Inc. in 1999. In 2000, Marathon took over ownership of old U.S. 23 and then purchased the remaining residential property located at Leech Station.
Document 4: Corn Belt: The Corn Belt is a region of the Midwestern United States that, since the 1850s, has dominated corn production in the United States. More generally, the concept of the ``Corn Belt ''connotes the area of the Midwest dominated by farming. Many towns in this area are connected to powerful farm organizations with lobbying power.
Document 5: Cayce, Kentucky: Cayce includes the area east and west from Willingham Bottom and Bayou de Chien Creek to Mud Creek and north and south from Moscow to the Middle Road (Kentucky Route 166). Part of the town, known as the "junction", is at the junction of Kentucky Routes 94 and 239. This is the location of the service stations and cafe. Also at that junction (on the northwest corner) is an old elementary school (now closed), with a monument out front identifying Cayce as the hometown of American cultural icon, railroad engineer Casey Jones (1863–1900), who grew up in the area.
Document 6: St. Louis: St. Louis (/ seɪnt ˈluːɪs /) is an independent city and major U.S. port in the state of Missouri, built along the western bank of the Mississippi River, on the border with Illinois. The city had an estimated 2016 population of 311,404, and is the cultural and economic center of the Greater St. Louis area (home to 2,916,447 people), making it the largest metropolitan area in Missouri and the 19th - largest in the United States.
Document 7: Near East: The United States is the chief remaining nation to assign official responsibilities to a region called the Near East. Within the government the State Department has been most influential in promulgating the Near Eastern regional system. The countries of the former empires of the 19th century have in general abandoned the term and the subdivision in favor of Middle East, North Africa and various forms of Asia. In many cases, such as France, no distinct regional substructures have been employed. Each country has its own French diplomatic apparatus, although regional terms, including Proche-Orient and Moyen-Orient, may be used in a descriptive sense. The most influential agencies in the United States still using Near East as a working concept are as follows.
Document 8: Geographic center of the United States: Its position as located in a 1918 survey is located at 39 ° 50 ′ N 98 ° 35 ′ W ﻿ / ﻿ 39.833 ° N 98.583 ° W ﻿ / 39.833; - 98.583 ﻿ (Geographic Center of the Contiguous United States), about 2.6 miles (4.2 km) northwest of the center of Lebanon, Kansas, approximately 12 miles (19 km) south of the Kansas - Nebraska border.
Document 9: Geographic center of the United States: Its position as located in a 1918 survey is located at 39 ° 50 ′ N 98 ° 35 ′ W ﻿ / ﻿ 39.833 ° N 98.583 ° W ﻿ / 39.833; - 98.583 ﻿ (Geographic Center of the Contiguous United States), in Kansas about 2.6 miles (4.2 km) northwest of the center of Lebanon, approximately 12 miles (19 km) south of the Kansas - Nebraska border.
Document 10: North Dakota: North Dakota is in the U.S. region known as the Great Plains. The state shares the Red River of the North with Minnesota to the east. South Dakota is to the south, Montana is to the west, and the Canadian provinces of Saskatchewan and Manitoba are to the north. North Dakota is situated near the middle of North America with a stone marker in Rugby, North Dakota marking the ``Geographic Center of the North American Continent ''. With an area of 70,762 square miles (183,273 km), North Dakota is the 19th largest state.
Document 11: Geography of the United States: The five Great Lakes are located in the north-central portion of the country, four of them forming part of the border with Canada, only Lake Michigan situated entirely within United States. The southeast United States contain subtropical forests and, near the gulf coast, mangrove wetlands, especially in Florida. West of the Appalachians lies the Mississippi River basin and two large eastern tributaries, the Ohio River and the Tennessee River. The Ohio and Tennessee Valleys and the Midwest consist largely of rolling hills and productive farmland, stretching south to the Gulf Coast.
Document 12: West Virginia: The Census Bureau and the Association of American Geographers classify West Virginia as part of the Southern United States. The northern panhandle extends adjacent to Pennsylvania and Ohio, with the West Virginia cities of Wheeling and Weirton just across the border from the Pittsburgh metropolitan area, while Bluefield is less than 70 miles (110 km) from North Carolina. Huntington in the southwest is close to the states of Ohio and Kentucky, while Martinsburg and Harpers Ferry in the Eastern Panhandle region are considered part of the Washington metropolitan area, in between the states of Maryland and Virginia. The unique position of West Virginia means that it is often included in several geographical regions, including the Mid-Atlantic, the Upland South, and the Southeastern United States. It is the only state that is entirely within the area served by the Appalachian Regional Commission; the area is commonly defined as ``Appalachia ''.
Document 13: Luther Yard: Luther Yard is a rail yard operated by the Norfolk Southern Railway in St. Louis, Missouri. It is located at 333 East Carrie Avenue, several miles north of downtown.
Document 14: Washington University in St. Louis: Tyson Research Center is a 2,000-acre (809 ha) field station located west of St. Louis on the Meramec River. Washington University obtained Tyson as surplus property from the federal government in 1963. It is used by the University as a biological field station and research/education center. In 2010 the Living Learning Center was named one of the first two buildings accredited nationwide as a "living building" under the Living Building Challenge, opened to serve as a biological research station and classroom for summer students.
Document 15: Hulsey Yard: Hulsey Yard is a rail yard of the CSX railroad, stretching approximately along the border of the Old Fourth Ward, Inman Park, Cabbagetown and Reynoldstown neighborhoods of Atlanta. The south wall of the rail yard along Wylie Street in Reynoldstown is one of the most prominent locations for street art in Atlanta. The art is managed by the Wallkeepers Committee of the Cabbagetown Neighborhood Improvement Association,
ground_truth: Midwestern United States
sub_queries: What state is Luther Yard located? Answer: Missouri
what region of the country is Missouri in Answer: Midwestern United States