Question: The 2013 Oklahoma Sooners football team was coached by which coach, who retired in 2017?
Context: The 1978 Oklahoma Sooners football team represented the University of Oklahoma in the college football 1978 NCAA Division I-A season.  Oklahoma Sooners football participated in the former Big Eight Conference at that time and played its home games in Oklahoma Memorial Stadium where it has played its home games since 1923.  The team posted an 11–1 overall record and a 6–1 conference record to earn a share of the conference title under head coach Barry Switzer.  This was Switzer's sixth conference title in six seasons since taking the helm in 1973. Joshua Kenneth Heupel (born March 22, 1978) is the offensive coordinator and quarterbacks coach for the Missouri Tigers.  He is also a former college football player who played quarterback for the Oklahoma Sooners football team at the University of Oklahoma.  During his college playing career, he was recognized as a consensus All-American, won numerous awards, and led Oklahoma to the 2000 BCS National Championship.  Heupel became a coach after his playing career ended.  He served as co-offensive coordinator for the Oklahoma Sooners until January 6, 2015, when he was fired from his position.  He was named the assistant head coach, offensive coordinator, and quarterbacks coach at Utah State on January 23, 2015.  After one season at Utah State, he was hired at the University of Missouri under Barry Odom's new staff. The Oklahoma Sooners football program is a college football team that represents the University of Oklahoma (variously "Oklahoma" or "OU").  The team is currently a member of the Big 12 Conference, which is in Division I Football Bowl Subdivision (formerly Division I-A) of the National Collegiate Athletic Association (NCAA).  The program began in 1895 and is one of the most successful programs since World War II with the most wins (606) and the highest winning percentage (.762) since 1945.  The program has 7 national championships, 45 conference championships, 154 All-Americans (76 consensus), and five Heisman Trophy winners.  In addition, the school has had 23 members (five coaches and 18 players) inducted into the College Football Hall of Fame and holds the record for the longest winning streak in Division I history with 47 straight victories, a record that stands to this day.  Oklahoma is also the only program that has had four coaches with 100+ wins.  They became the sixth NCAA FBS team to win 850 games when they defeated the Kansas Jayhawks on November 22, 2014.  The Sooners play their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma.  Lincoln Riley is currently the team's head coach. The 1984 Oklahoma Sooners football team represented the University of Oklahoma in the college football 1984 NCAA Division I-A season.  Oklahoma Sooners football participated in the former Big Eight Conference at that time and played its home games in Gaylord Family Oklahoma Memorial Stadium where it has played its home games since 1923.  The team posted a 9–2–1 overall record and a 6–1 conference record to earn a share of the Conference title under head coach Barry Switzer who took the helm in 1973.  This was Switzer's ninth conference title in twelve seasons. The 2013 Oklahoma Sooners football team represented the University of Oklahoma in the 2013 NCAA Division I FBS football season, the 119th season of Sooner football.  The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his 15th season as head coach.  They played their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma.  They were a charter member of the Big 12 Conference. The 1979 Oklahoma Sooners football team represented the University of Oklahoma in the college football 1979 NCAA Division I-A season.  Oklahoma Sooners football participated in the former Big Eight Conference at that time and played its home games in Gaylord Family Oklahoma Memorial Stadium where it has played its home games since 1923.  The team posted an 11–1 overall record and a 7–0 conference record to earn the Conference title outright under head coach Barry Switzer who took the helm in 1973.  This was Switzer's seventh conference title and fourth undefeated conference record in seven seasons. The Oklahoma Sooners football program is a college football team that represents the University of Oklahoma.  The team has had 22 head coaches since organized football began in 1895.  The Sooners have played in more than 1,200 games in its 121 seasons.  In those seasons, eight coaches have led the Sooners to postseason bowl games: Tom Stidham, Jim Tatum, Bud Wilkinson, Gomer Jones, Chuck Fairbanks, Barry Switzer, Gary Gibbs and Bob Stoops.  Eight coaches have won conference championships with the Sooners: Bennie Owen, Stidham, Dewey Luster, Tatum, Wilkinson, Fairbanks, Switzer and Stoops.  Wilkinson, Switzer and Stoops have also won national championships with the Sooners.  Stoops is the all-time leader in games coached and won, Owen is the all-time leader in years coached, while Switzer is the all-time leader in winning percentage.  John Harts is, in terms of winning percentage, the worst coach the Sooners have had as he lost the only game he coached.  John Blake has the lowest winning percentage of those who have coached more than one game with .353 in his 34 games. The 1956 Oklahoma Sooners football team (variously "Oklahoma", "OU", or the "Sooners") represented the University of Oklahoma in the 1956 college football season.  It was the 62nd season of play for the Sooners.  The team was led by Hall of Fame head coach Bud Wilkinson.  They were led on offense by quarterback Jim Harris, and played their home games at Oklahoma Memorial Stadium in Norman, Oklahoma. Robert Anthony Stoops (born September 9, 1960) is a former American college football coach.  He is the former head football coach at the University of Oklahoma, a position he held from 1999 until he announced his retirement June 7, 2017.  During the 2000 season, Stoops led the Sooners to an Orange Bowl victory and a national championship. The 1895 Oklahoma Sooners football team represented the Oklahoma Sooners of the University of Oklahoma during the 1895 college football season and was its first football team ever fielded.  The team completed its inaugural season with a 0–1 record.  The Sooners played their first football game in history against a town team from Oklahoma City and lost by a final score of 34–0.  This was the program's one and only season under the guidance of head coach John A. Harts, the next season he was gold prospecting in the Arctic.
Answer: Robert Anthony Stoops