Question: Roosevelt Theodore Nix, is a former American football defensive end who played three seasons in the National Football League, he first enrolled at the College of DuPage before transferring to Central State University(CSU), a historically black university (HBCU), located in Wilberforce, Ohio, in which country?

Context paragraphs:
Kelvin Korver: Kelvin Mitchell Korver (born February 21, 1949) is a former American football defensive tackle who played three seasons with the Oakland Raiders of the National Football League (NFL).  He was drafted by the Raiders in the second round of the 1972 NFL Draft.  He first enrolled at Texas A&M University before transferring to Northwestern College.  Korver attended Irving High School in Irving, Texas.

Kywin Supernaw: Kywin Supernaw (born June 2, 1975) is a former American football defensive back who played three seasons with the Detroit Lions of the National Football League.  He first enrolled at Northeastern Oklahoma A&M College before transferring to Indiana University Bloomington.  He attended Skiatook High School in Skiatook, Oklahoma.

Freddie Summers: Freddie S. Summers (born February 16, 1947) is a former American football defensive back who played three seasons with the Cleveland Browns of the National Football League.  He was drafted by the Cleveland Browns in the fourth round of the 1969 NFL Draft.  He first enrolled at McCook Community College before transferring to Wake Forest University, where he played quarterback.  Summers attended Dorchester High School in Dorchester, Boston, Massachusetts.  On June 15, 1972, he was traded to the New York Giants in exchange for the Giants second pick in the 1973 NFL Draft.  He was placed on injured waivers on August 30, 1972.

Central State University: Central State University (CSU) is a historically black university (HBCU) located in Wilberforce, Ohio, United States.  It is a member-school of the Thurgood Marshall College Fund.

Lem Burnham: Lemuel L. Burnham (born August 30, 1947) is a former American football defensive end who played three seasons with the Philadelphia Eagles of the National Football League (NFL).  He was drafted by the Kansas City Chiefs in the fifteenth round of the 1974 NFL Draft.  He first enrolled at Santa Ana Junior College before transferring to U.S. International University.  Burnham attended Jewett High School in Winter Haven, Florida.  He was also a member of the The Hawaiians, Washington Redskins and Winnipeg Blue Bombers.

Kevin Johnson (defensive tackle): Kevin Lamar Johnson (born October 30, 1970) is a former American football defensive tackle who played three seasons in the National Football League with the Philadelphia Eagles and Oakland Raiders.  He was drafted by the New England Patriots in the fourth round of the 1993 NFL Draft.  He first enrolled at Los Angeles Harbor College before transferring to Texas Southern University.  Johnson attended Westchester High School in Los Angeles, California.  He was also a member of the Orlando Predators and Los Angeles Avengers of the Arena Football League.

Roosevelt Nix (defensive end): Roosevelt Theodore Nix (born April 17, 1967) is a former American football defensive end who played three seasons in the National Football League with the Cincinnati Bengals and Minnesota Vikings.  He was drafted by the Cincinnati Bengals in the eighth round of the 1992 NFL Draft.  He first enrolled at the College of DuPage before transferring to Central State University.  Nix attended Scott High School in Toledo, Ohio.  He was also a member of the Green Bay Packers, Arizona Cardinals, Minnesota Fighting Pike, New York CityHawks and New England Sea Wolves.

Brad Anae: Brad Anae (born October 3, 1957) is a former American football defensive end who played three seasons in the United States Football League (USFL) with the Philadelphia Stars, Houston Gamblers and San Antonio Gunslingers.  He first enrolled at the University of Hawaii before transferring to the Brigham Young University.  He attended Kahuku High & Intermediate School in Kahuku, Hawaii.

Chad DeGrenier: Chad DeGrenier (born January 13, 1973) is a former American football quarterback who played three seasons in the Arena Football League (AFL) with the Arizona Rattlers and Carolina Cobras.  He first enrolled at Grossmont College before transferring to Washington State University and lastly Midwestern State University.  His father, Jack DeGrenier, played in the National Football League.

Mark Kafentzis: Mark Kevin Kafentzis (born June 30, 1958) is a former American football defensive back who played three seasons in the National Football League (NFL) with the Cleveland Browns and Baltimore/Indianapolis Colts.  He was drafted by the Browns in the eighth round of the 1982 NFL Draft.  He first enrolled at Columbia Basin College before transferring to the University of Hawaiʻi at Mānoa.

Supporting paragraphs: Roosevelt Nix (defensive end) Central State University
Answer: United States