Question: In what month was the current head coach of the Oklahoma Sooners born?

full_context: Document 1: Mike Leach (American football coach): Michael Charles Leach (born March 9, 1961) is an American college football coach. He is the head coach of the Washington State Cougars football team. Previously, he was head coach of the Texas Tech Red Raiders football team, leading the Red Raiders to winning seasons in every year of his tenure.
Document 2: 2015 Oklahoma Sooners football team: The 2015 Oklahoma Sooners football team represented the University of Oklahoma in the 2015 NCAA Division I FBS football season, the 121st season of Sooner football. The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his 17th 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.
Document 3: List of Oklahoma Sooners head baseball coaches: The Oklahoma Sooners baseball program is a college baseball team that represents the University of Oklahoma. The team has had eight head coaches since organized baseball began 1898 with the nickname "Sooners". The Sooners have played in more than 3,400 games during its 110 seasons. In those seasons, five coaches have won conference championships with the Sooners: Bill Owen, Lawrence Haskell, Jack Baer, Enos Semore and Larry Cochell. Two coaches have won national championships: Baer and Cochell. Semore is the all-time leader in games coached, years coached and wins. Owen is the overall leader in winning percentage. Baer is, in terms of winning percentage, the worst coach the Sooners have had. Of the eight head coaches, two have received National Coach of the Year honors. The current head coach is Sunny Golloway who was hired in July 2005.
Document 4: Roy Williams (safety): Roy Lee Williams (born August 14, 1980), is a former American college and professional football player who was a safety in the National Football League (NFL) for nine seasons. He played college football for the University of Oklahoma, and was recognized as a unanimous All-American. He was drafted by the Dallas Cowboys eighth overall in the 2002 NFL Draft, and played professionally for the Cowboys and Cincinnati Bengals. He earned five straight Pro Bowl selections from 2003 to 2007. Williams is currently a sideline reporter for Oklahoma football games.
Document 5: 2014 Oklahoma Sooners football team: The 2014 Oklahoma Sooners football team represented the University of Oklahoma in the 2014 NCAA Division I FBS football season, the 120th season of Sooner football. The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his 16th season as head coach. They played their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma. They were a member of the Big 12 Conference.
Document 6: Josh Heupel: 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.
Document 7: List of Oklahoma Sooners head football coaches: 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.
Document 8: Mike Stoops: Michael Joseph Stoops (born December 13, 1961) is an American football coach and former player. He is currently the defensive coordinator at the University of Oklahoma. Stoops served as the head football coach at the University of Arizona from 2003 until his firing during the 2011 season. He previously served as an assistant coach at the University of Iowa, Kansas State University, and Oklahoma. He is the younger brother of Bob Stoops, the former head coach of the Oklahoma Sooners football program, and the older brother of Mark Stoops, head coach at the University of Kentucky.
Document 9: Lincoln Riley: Lincoln Michael Riley (born September 5, 1983) is an American football coach and former player. He is currently the head coach at the University of Oklahoma.
Document 10: Bob Stoops: 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.
Document 11: 2005 Oklahoma Sooners football team: The 2005 Oklahoma Sooners football team represented the University of Oklahoma in the 2005 NCAA Division I-A football season, the 111th season of Sooner football. The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his seventh 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.
Document 12: 2016 Oklahoma Sooners football team: The 2016 Oklahoma Sooners football team represented the University of Oklahoma in the 2016 NCAA Division I FBS football season, the 122nd season of Sooner football. The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his 18th season as head coach. They played their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma. They are a charter member of the Big 12 Conference.
Document 13: Oklahoma Sooners football: 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.
Document 14: Oklahoma Sooners football: 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.
Document 15: 2004 Oklahoma Sooners football team: The 2004 Oklahoma Sooners football team represented the University of Oklahoma during the 2004 NCAA Division I-A football season, the 110th season of Sooner football. The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his sixth 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.
ground_truth: September