Question: Wendell Edward Tucker, is a former professional American football player who played wide receiver for how many seasons for the Los Angeles Rams, in May 1971, Tucker was traded along with Billy Truax to the Dallas Cowboys for receiver Lance Rentzel?

Context paragraphs:
Billy Waddy: Billy Waddy (born February 19, 1954) is a former professional American football player who played wide receiver for seven seasons for the Los Angeles Rams and the Minnesota Vikings.

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.

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.

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.

Stepfret Williams: Stepfret Williams III (born June 14, 1973) is a former professional American football player who played wide receiver for three seasons for the Dallas Cowboys and the Cincinnati Bengals.  He was also the leading receiver in yards in the XFL.

Todd Kinchen: Todd Kinchen (born January 7, 1969) is a former professional American football player who played wide receiver for seven seasons in the National Football League (NFL) for the Los Angeles Rams, the Denver Broncos, and the Atlanta Falcons.  He currently holds an NFL record with two punt return touchdowns in a single game, which he shares with 13 other players.  His father is Gaynell "Gus" Kinchen, a member of the 1958 LSU Tigers football team and one of the famed Chinese Bandits.  His brother Brian also played in the NFL.

Butch Johnson (American football): Michael "Butch" McColly Johnson (born May 28, 1954 in Los Angeles) is a former professional American football player who played wide receiver in the National Football League for the Dallas Cowboys (1976–1983) and Denver Broncos (1984–1985).  He played college football at the University of California, Riverside and was drafted in the third round (87th overall) of the 1976 NFL Draft.

Sean LaChapelle: Sean Paul LaChapelle is a former professional American football player who played wide receiver for two seasons for the Los Angeles Rams and Kansas City Chiefs.  LaChapelle attended Vintage High School in Napa, California where he helped lead his team to a Sac-Joaquin Section title in his junior year.  During his career at UCLA LaChapelle became one of the school's receivers catching 142 passes for 2,027 yards with 14 touchdowns.  He was signed to the Chiefs after wide receiver Lake Dawson suffered a season-ending injury and was placed on injured reserve.  LaChapelle was also the 1996 World League of American Football offensive MVP.

Gordon Jones (American football): Gordon Jones (born July 25, 1957) is a former professional American football player who played wide receiver for five seasons for the Tampa Bay Buccaneers and Los Angeles Rams.

Supporting paragraphs: Wendell Tucker Lance Rentzel
Answer: four