Question: Where did the 2013 Dallas Cowboys' head coach play college football?

Context paragraphs:
Cornell Green (defensive back): Cornell M. Green (born February 10, 1940), is a former American football player, a defensive back for thirteen seasons in the National Football League with the Dallas Cowboys.  He did not play college football at Utah State University, but was a two-time All-American basketball player for the Aggies, selected in 1962 NBA draft, but not in the NFL draft.

Clint Dolezel: Clint Dolezel (born March 25, 1970) is an American football coach and former professional arena football player in the Arena Football League (AFL).  Dolezel was a quarterback in the AFL, and currently the head coach of the AFL's Philadelphia Soul.  He played college football at East Texas State, and was in the AFL for 13 seasons from 1995 to 2008.  Dolezel first became a head coach in 2010 with the San Angelo Stampede Express of the Indoor Football League (IFL).  After just a single season, Dolezel returned to the AFL as the head coach of the Dallas Vigilantes.  After the Vigilantes franchise suspended operations, Dolezel joined the Philadelphia Soul as their offensive coordinator under head coach Doug Plank.  Plank left the Soul following the 2012 season, and the Soul promoted Dolezel to head coach.  As an AFL player, he was originally signed by the Milwaukee Mustangs.  In his career, he has also played for the Texas Terror/Houston Thunderbears, Grand Rapids Rampage, Las Vegas Gladiators, and the Dallas Desperados.  Dolezel is also a scout for the Dallas Cowboys.

Ken Gray (American football): Kenneth Don Gray (born March 10, 1936 in San Saba, Texas) was an offensive guard who played 13 seasons in the National Football League for the Chicago Cardinals/St. Louis Cardinals and the Houston Oilers.  Gray attended and played football for four seasons at Howard Payne University.  His first NFL contract, in 1958, paid him $6,000.00.  In those days the league was composed of 12 teams, split into two divisions.  After retiring as a player, earning six All-Pro awards, he served for three years as head coach at his high school alma mater, Llano High and offensive line coach for the 1977 AFC Champion Denver Bronco team that earned its way to Super Bowl XII, to play against the Dallas Cowboys.  In 2016, he was inducted into the Texas Sports Hall of Fame along with former University of Texas head football coach Fred Akers, former Dallas Cowboys offensive lineman Larry Allen and former Major League Baseball pitcher Andy Pettitte.  He earned a spot on the St. Louis Cardinals’ All-Time Team and the NFL All-1960s Team.  A Christian, Gray first and foremost considers himself blessed with his lovely and gracious wife, Shirley, who has stood by him through all the years of risking injury in high school, college and league play, and the unique challenges of his coaching years to the present.  They met and were wed back in their high school days at Llano High School.  Their union produced two fine sons, Shane and Boyd and a grand child, Garret.

Barry Switzer: Barry Layne Switzer (born October 5, 1937) is a former American football player and coach.  He served for 16 years as head football coach at the University of Oklahoma and four years as head coach for the Dallas Cowboys of the National Football League (NFL).  He helped the Cowboys win Super Bowl XXX against the Pittsburgh Steelers.  He has one of the highest winning percentages of any college football coach in history, and is one of only three head coaches to win both a college football national championship and a Super Bowl, the others being Jimmy Johnson and Pete Carroll.

Todd Lowber: Todd Lowber (born January 26, 1982) is a former gridiron football wide receiver.  He most recently played for the Toronto Argonauts of the Canadian Football League (CFL).  He was signed by the Minnesota Vikings as a undrafted free agent in 2007.  He has also been a member of the New York Giants, Dallas Cowboys, and Miami Dolphins.  He earned a Super Bowl ring as a member of the Giants' practice squad in Super Bowl XLII.  He did not play college football but is a former college basketball player and high jump champion.

Rico Gathers: Ricardo Darnell "Rico" Gathers (born January 7, 1994) is an American football tight end for the Dallas Cowboys of the National Football League (NFL).  He played college basketball at Baylor University and did not play college football.  He was drafted by the Cowboys in the sixth round (217th overall) in the 2016 NFL Draft.

Jerry Tubbs: Gerald J. Tubbs (January 23, 1935 – June 13, 2012) was an American football linebacker who played for ten seasons in the National Football League from 1957 to 1966, mainly for the Dallas Cowboys.  He was selected by the Dallas Cowboys in the 1960 NFL Expansion Draft.  After his retirement he stayed with the Cowboys as an assistant coach for 22 years.  He played college football at the University of Oklahoma.  In 1996, he was inducted into the College Football Hall of Fame.

2013 Dallas Cowboys season: The Dallas Cowboys season was the franchise's 54th season in the National Football League, the fifth playing their home games at AT&T Stadium (formerly known as "Cowboys Stadium") and the third full season under head coach Jason Garrett.  The Cowboys finished 8–8 for a third consecutive season, but missed the playoffs for a fourth consecutive season after losing their final game for the third straight season, this time to the Philadelphia Eagles.

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.

Josh Holliday: Josh Holliday (born September 14, 1976) is an American college baseball coach and former professional player in Minor League Baseball.  Currently the head coach of the Oklahoma State Cowboys baseball team, he was hired to this position prior to the 2013 season.  In 2014, Holliday was the Big 12 Conference Baseball Coach of the Year as OSU claimed the conference regular season championship.  Hollidays' Cowboys pulled OSU a little Cowboy baseball tradition out of the fire and faced Oklahoma on the final weekend of 2017.  The team was in danger of missing out of the postseason for the 1st time in Hollidays tenure at Oklahoma State.  The Cowboys swept the instate rival Oklahoma Sooners (#2 seed going into region play) to claim the last and final spot as the 8th seed in the BigXII Championship.  The Cowboys went back to their traditionion and won just the 2nd Big 12 tournament in schools rich baseball history.  The Cowboys won 16 straight Big 8 tournaments before the formation of the Big12.  The Cowboys became the 1st eight seed (last seed) to win the conference championship and by doing so Holliday got his team in the NCAA postseason for the 5th time in his 5 years at the school.  The season was full of injuries from top to bottom Holliday and is associated Head Coach and current (2016) assistant coach of the year Rob Walton put together a pitching staff that was nothing short of magical.  The Cowboys luck would run out as the were sent to the Arkansas Regional and went 0-2 losing game one to Regional champions Missouri State Bears on a two out bottom of the 9th walk off HR.  Garrett Benge hit for the cycle for Hollidays Cowboys but it wasn't enough.  Garrett McCain would be named 1st team all-American the 25th in Cowboys history he would one of five current Cowboys drafted in 2017 preceded by 11 from the 2016 College World Series club.  Giving Holliday 16 in 2 years.  The Cowboys went on the end of the year run the had seen them lose six games in a row and face being the 1st Oklahoma State team to finish under .500 in 40 years.The Cowboys finished 30-27 on the year.  The 6-5 victory of the Texas Longhorns would be Hollidays' 200th victory as the head man of Oklahoma State.

Supporting paragraphs: 2013 Dallas Cowboys season Jason Garrett
Answer: Princeton University