Question: William Frederick Truax was traded by the Los Angeles Rams to the Dallas Cowboys for a wide receiver who played college football at what university?

Context paragraphs:
Wendell Tucker: Wendell Edward Tucker (born September 4, 1943) is a former professional American football player who played wide receiver for four seasons for the Los Angeles Rams.  Tucker spent most of his first season on the "taxi-squad" while learning behind the Rams' starting flanker Bernie Casey.  Tucker saw action in 10 of the team's 14 games in 1968 (catching only 7 passes but 4 of them went for touchdowns), and then became the starting flanker after Casey's retirement.  The 1969 season would prove to be his most productive as, playing opposite wide receiver Jack Snow, he caught 38 passes for 629 yards and 7 touchdowns, including a 93 yarder vs. the 49ers for the Coastal Division champion Rams.  Tucker returned in 1970 but was hampered by injuries and caught only 12 passes in 12 games.  In May 1971, Tucker was traded along with Billy Truax to the Dallas Cowboys for receiver Lance Rentzel.  However, unable to regain his trademark speed because of a knee injury, Tucker retired before the start of the 1971 season.

Ron Jessie: Ron Ray Jessie (February 4, 1948 - January 13, 2006) was a professional American football wide receiver in the National Football League for the Detroit Lions, Los Angeles Rams and Buffalo Bills.  His best season came in 1976 with the Los Angeles Rams, when he was named to the Pro Bowl.  He played college football at the University of Kansas.

List of Los Angeles Rams first-round draft picks: The Los Angeles Rams, a professional American football team based in Los Angeles, joined the National Football League (NFL) as Cleveland Rams in 1937.  The Rams began playing in 1936 as a charter member of the second American Football League.  Although the NFL granted membership to the same owner, the NFL considers it a separate entity.  In 1946, Rams' owner Dan Reeves, fed up with poor attendance at Cleveland Stadium, moved the Rams to Los Angeles, and the team played there from 1946 to 1979.  Before his death in 1979, later Rams owner Carroll Rosenbloom planned a move within the Los Angeles metropolitan area to Anaheim, using the venue now known as Angel Stadium, and his widow and successor Georgia Frontiere went through with the move in 1980, with the team still officially representing Los Angeles.  The Rams moved to St. Louis in 1995 and renamed the team St. Louis Rams.  In January 2016, the Rams and the NFL announced that the team would return to Los Angeles.  The team now plays in its original L.A. venue, the Los Angeles Memorial Coliseum, while awaiting the 2020 opening of its new stadium in suburban Inglewood.

Hugh Pitts: Hugh Lynn Pitts (April 8, 1934 – April 14, 2017) was an American football player.  Pitts attended Texas Christian University and played college football at the center position for the TCU Horned Frogs football team.  He was selected by the Central Press Association as a second-team player on its 1954 College Football All-America Team.  He was selected by the Los Angeles Rams in the second round (23rd overall pick) of the 1956 NFL Draft.  He appeared in nine games for the Rams during the 1956 NFL season and intercepted three passes.  He did not see further regular season action for the Rams and was traded to the Dallas Cowboys in July 1960.  Pitts instead jumped to the new American Football League and appeared in 12 games for the Houston Oilers during the 1960 AFL season.  He died on April 14, 2017 at the age of 83.

Billy Truax: William Frederick Truax (born July 15, 1943) is a former professional American football tight end in the National Football League (NFL) from 1964 to 1973 for the Los Angeles Rams and the Dallas Cowboys.  He played in high school at Holy Cross in New Orleans and college football at Louisiana State University and was drafted in the second round of the 1964 NFL draft.  Following the 1970 NFL season, Truax was traded by the Rams to the Cowboys for wide receiver Lance Rentzel.  He was part of the Cowboys' Super Bowl VI championship team in 1971.

Lance Rentzel: Thomas Lance Rentzel (born October 14, 1943) is a former American football flanker in the National Football League (NFL) for the Minnesota Vikings, Dallas Cowboys and the Los Angeles Rams.  He played college football at the University of Oklahoma.

Charley Cowan: Charles Edward Cowan (June 19, 1938 in Braeholm, West Virginia – April 29, 1998 in Los Angeles, California) was a former American football offensive tackle who played fifteen seasons in the National Football League with the Los Angeles Rams from 1961 to 1975.  Cowan was a huge intimidating presence on the left of Tom Mack, a member of the Pro Football Hall of Fame, from 1966 to 1975, forming a potent left side of the offensive line, with help from Ken Iman at center from 1965 to 1975.  In that 1961 to 1975 span, the Rams made the playoffs 5 times (1967,1969,1973,1974,1975), reaching the NFC championship game of the 1974-75 NFL playoffs and the 1975-76 NFL playoffs, but losing to the Minnesota Vikings and to the Dallas Cowboys, respectively.  In the 1974 divisional round, the Rams defeated the Washington Redskins, as Cowan was successful against the opposing the right defensive end Verlon Biggs.  In the 1975 divisional round, Doug France started in his place as the Rams defeated the St. Louis Cardinals.  Cowan came back to play against the Cowboys, his final game, as the Rams could not get past them.  Cowan was replaced by Doug France in 1976.

Woodley Lewis: Woodley Carl Lewis, Jr. (June 14, 1925 – December 29, 2000) was an American football end, wide receiver and defensive back in the National Football League (NFL).  He played eleven seasons for the Los Angeles Rams, the Chicago Cardinals, and the Dallas Cowboys.  He played college football for the University of Oregon.

Donnie Williams (American football): Charles Donell "Donnie" Williams (born March 12, 1948) is an American football wide receiver who played one season with the Los Angeles Rams of the National Football League.  He was drafted by the Rams in the second round of the 1970 NFL Draft.  He played college football for the Prairie View A&M Panthers of Prairie View A&M University.  He attended L. G. Pinkston High School in Dallas, Texas.

Shannon Culver: 'Skinny' Shannon Culver (born October 5, 1971) is a former Canadian Football League Wide receiver for the Baltimore Stallions (1994–95) Spring Football League Los Angeles Dragons (2000), XFL Orlando Rage (2001) and Arena Football League wide receiver for Anaheim Piranhas (1997), the Grand Rapids Rampage (1998), the Los Angeles Avengers (2000–2001), the Dallas Desperados (2002–2003), and the Austin Wranglers (2004).  He then signed with the Arizona Rattlers after taking the 2005 season off.  Culver played college football for the Oklahoma State Cowboys and Los Angeles Pierce College.

Supporting paragraphs: Billy Truax Lance Rentzel
Answer: University of Oklahoma