Question: What region of the country is the state where Washington University can be found, in the city that hosted the 1904 Summer Olympics?

full_context: Document 1: 1904 Summer Olympics: The 1904 Summer Olympics, officially known as the Games of the III Olympiad, was an international multi-sport event which was celebrated in St. Louis, Missouri, in the United States from August 29 until September 3, 1904, as part of an extended sports program lasting from July 1 to November 23, 1904, at what is now known as Francis Field on the campus of Washington University in St. Louis. It was the first time that the Olympic Games were held outside Europe.
Document 2: Alan Valentine: Alan Chester Valentine (February 23, 1901 – July 14, 1980) was an American academic who competed on the gold-medal winning American rugby union team in the 1924 Summer Olympics, was president of the University of Rochester, and served in the Truman Administration as a Marshall Plan official and as the first head of the Economic Stabilization Agency.
Document 3: Washington University in St. Louis: In 1867, the university opened the first private nonsectarian law school west of the Mississippi River. By 1882, Washington University had expanded to numerous departments, which were housed in various buildings across St. Louis. Medical classes were first held at Washington University in 1891 after the St. Louis Medical College decided to affiliate with the University, establishing the School of Medicine. During the 1890s, Robert Sommers Brookings, the president of the Board of Trustees, undertook the tasks of reorganizing the university's finances, putting them onto a sound foundation, and buying land for a new campus.
Document 4: Howard Valentine: He competed for the United States in the 1904 Summer Olympics held in St Louis, United States in the 800 metres where he won the silver medal and in the 1500 metres event where he finished seventh. He also competed for the New York Athletic Club team in the 4 mile team race against Chicago AA with teammates Arthur Newton, George Underwood, Paul Pilgrim and David Munson. They won the race and the gold medal.
Document 5: 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 6: 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 7: Washington University in St. Louis: Graduate schools include the School of Medicine, currently ranked sixth in the nation, and the George Warren Brown School of Social Work, currently ranked first. The program in occupational therapy at Washington University currently occupies the first spot for the 2016 U.S. News & World Report rankings, and the program in physical therapy is ranked first as well. For the 2015 edition, the School of Law is ranked 18th and the Olin Business School is ranked 19th. Additionally, the Graduate School of Architecture and Urban Design was ranked ninth in the nation by the journal DesignIntelligence in its 2013 edition of "America's Best Architecture & Design Schools."
Document 8: 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 9: Washington University in St. Louis: Washington University in St. Louis (WashU, or WUSTL) is a private research university in St. Louis, Missouri. Founded in 1853, and named after George Washington, the university has students and faculty from all 50 U.S. states and more than 120 countries. As of 2017, 24 Nobel laureates in economics, physiology and medicine, chemistry, and physics have been affiliated with Washington University, nine having done the major part of their pioneering research at the university.Washington University is made up of seven graduate and undergraduate schools that encompass a broad range of academic fields. To prevent confusion over its location, the Board of Trustees added the phrase "in St. Louis" in 1976.
Document 10: Washington University in St. Louis: The Washington University School of Medicine, founded in 1891, is highly regarded as one of the world's leading centers for medical research and training. The School ranks first in the nation in student selectivity. Among its many recent initiatives, The Genome Center at Washington University (directed by Richard K. Wilson) played a leading role in the Human Genome Project, having contributed 25% of the finished sequence. The School pioneered bedside teaching and led in the transformation of empirical knowledge into scientific medicine. The medical school partners with St. Louis Children's Hospital and Barnes-Jewish Hospital (part of BJC HealthCare), where all physicians are members of the school's faculty.
Document 11: Louis Wilkins: He competed for the United States in the 1904 Summer Olympics held in St Louis, United States in the pole vault where he won the bronze medal.
Document 12: 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 13: 400 metres at the Olympics: Only two athletes have won the event twice: Marie - José Pérec became the first to defend the title in 1996, then Michael Johnson followed with victories in 1996 and 2000. No athlete has won more than three medals. Several medalists in the event have also had success in the 200 metres at the Olympics: Johnson, Perec, Szewińska and Valerie Brisco - Hooks have all won titles at both distances. Athletes chosen for the event almost always form part of their nation's team for the 4 × 400 metres relay at the Olympics.
Document 14: Washington University in St. Louis: Washington University in St. Louis (Wash. U., or WUSTL) is a private research university located in St. Louis, Missouri, United States. Founded in 1853, and named after George Washington, the university has students and faculty from all 50 U.S. states and more than 120 countries. Twenty-five Nobel laureates have been affiliated with Washington University, nine having done the major part of their pioneering research at the university. Washington University's undergraduate program is ranked 15th by U.S. News and World Report. The university is ranked 32nd in the world by the Academic Ranking of World Universities.
Document 15: 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.
ground_truth: Midwestern United States
sub_queries: Athletics at the 1904 Summer Olympics >> located in the administrative territorial entity Answer: St Louis
Where is Washington University in St Louis located? Answer: Missouri
what region of the country is Missouri in Answer: Midwestern United States