Question: William Frederick Truax was traded by the Los Angeles Rams to the Dallas Cowboys for a wide receiver born in what year?

Context paragraphs:
Chuck Scott: Chuck Scott (born May 24, 1963) is a former professional American football player who played wide receiver for the Los Angeles Rams and Dallas Cowboys.

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.

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.

Los Angeles Rams Cheerleaders: The Los Angeles Rams Cheerleaders are the cheerleading squad for the Los Angeles Rams professional football team.  They were established in 1974 during the team's original tenure in Los Angeles and were known as the Embraceable Ewes.  The cheerleading organization became known as the "St. Louis Rams Cheerleaders" when the team moved to St. Louis, Missouri.  Beginning with the 2016 NFL season, the organization changed their name to the "Los Angeles Rams Cheerleaders" to associate themselves with the recently relocated Los Angeles Rams football team.

List of Los Angeles Rams head coaches: The Los Angeles Rams are a professional football team based in the Los Angeles metropolitan area.  The Rams compete in the National Football League (NFL) as a member club of the league's National Football Conference (NFC) West division.  The Rams played their first season in 1936 in Cleveland, Ohio.  During World War II, the Rams did not play during the 1943 season because of wartime restrictions and shortages.  The team became known as the Los Angeles Rams after it moved to Los Angeles, California in 1946.  After the 1979 season, the Rams moved south to the suburbs in nearby Orange County, playing their home games at Anaheim Stadium in Anaheim for fifteen seasons (–) but kept their Los Angeles name.  The club moved east to St. Louis, Missouri before the 1995 season, and moved back to Los Angeles before the 2016 season.

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.

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.

Tim Lester (running back): Timothy Lee Lester (born June 15, 1968) is a former professional American football running back in the National Football League for eight seasons for the Los Angeles Rams, Pittsburgh Steelers, and Dallas Cowboys.  He was drafted by the Los Angeles Rams in the tenth round of the 1992 NFL Draft.

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.

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.

Supporting paragraphs: Billy Truax Lance Rentzel
Answer: 1943