Question: What is the birthdate of this former American football quarterback who played for the Dallas Cowboys and who was protected by his offensive tackle Mark Tuinei?

Context paragraphs:
Troy Aikman: Troy Kenneth Aikman (born November 21, 1966) is a former American football quarterback who played for the Dallas Cowboys in the National Football League (NFL).  The number one overall draft pick in 1989, Aikman played twelve consecutive seasons as quarterback with the Cowboys.  During his career he was a six-time Pro Bowl selection, led the team to three Super Bowl victories, and was the Super Bowl XXVII MVP.  Aikman was elected to the Pro Football Hall of Fame in 2006 and to the College Football Hall of Fame on December 9, 2008 in New York City.

Frank Pollack (American football): Frank Pollack (born November 5, 1967) is an American football coach and former player who is the offensive line coach for the Dallas Cowboys of the National Football League (NFL).  He was the former offensive line assistant coach for the Cowboys from 2013-2014.  He was the former offensive linecoach for the Oakland Raiders.  A former San Francisco 49ers offensive tackle and guard for seven seasons, he later served as the assistant offensive line coach for the Houston Texans.

Erik Williams: Erik George Williams (born September 7, 1968) is a former American football offensive tackle.  He played in the National Football League (NFL) for the Dallas Cowboys from 1991 to 2000 and the Baltimore Ravens in 2001.  He played college football at Central State University in Wilberforce, Ohio, where he was an NAIA All-American offensive lineman.  Williams was a third round selection in the 1991 NFL Draft.  He is a member of Phi Beta Sigma Fraternity.

Marc Colombo: Marc Edward Colombo (born October 8, 1978) is a former American football offensive tackle who played for ten seasons in the National Football League (NFL) for the Chicago Bears, Dallas Cowboys and Miami Dolphins.  He played college football at Boston College.  He is the current Assistant Offensive Line Coach for the Dallas Cowboys.

Tyron Smith: Tyron Smith (born December 12, 1990) is an American football offensive tackle for the Dallas Cowboys of the National Football League (NFL).  He played college football at USC where he won the Morris Trophy, recognizing the best offensive and defensive linemen on the West Coast, in 2010.  Smith was drafted by the Cowboys with the ninth overall pick in the 2011 NFL Draft.

Charles Brown (offensive lineman): Charles Rashad Jamaal Brown (born April 10, 1987) is a former American football offensive tackle in the National Football League (NFL) for the New Orleans Saints, New York Giants and Dallas Cowboys.  He played college football at USC, where he won the Morris Trophy, recognizing the best offensive and defensive linemen on the West Coast in 2009.

La'el Collins: La'el Collins (born July 26, 1993) is an American football offensive tackle for the Dallas Cowboys of the National Football League (NFL).  He played college football at Louisiana State University (LSU) where he won the Jacobs Blocking trophy, recognizing Southeastern Conference's (SEC) top offensive lineman, in 2014.  Collins signed with the Dallas Cowboys as an undrafted free agent in 2015.

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.

Jason Garrett: Jason Calvin Garrett (born March 28, 1966) is an American football head coach of the Dallas Cowboys of the National Football League (NFL).  Garrett was the offensive coordinator and assistant head coach of the Cowboys before being promoted to interim head coach after the firing of Wade Phillips on November 8, 2010.  He is a former professional American football quarterback in the National Football League for the Dallas Cowboys, New York Giants, Tampa Bay Buccaneers and Miami Dolphins.  He played college football at Princeton University.

Mark Tuinei: Mark Pulemau Tuinei (March 31, 1960 – May 6, 1999) was an American football offensive tackle in the National Football League for the Dallas Cowboys.  Known as a "gentle giant", his career lasted for 15 years (1983–1997) and his ability to protect quarterback Troy Aikman and to run-block for running back Emmitt Smith helped them win Super Bowls in 1992, 1993, and 1995 and the NFC East Division in 1985 and 1992-96.  He was also selected for the Pro Bowl in 1994 and 1995.

Supporting paragraphs: Mark Tuinei Troy Aikman
Answer: November 21, 1966