Question: Stephen Todd Alexander played college football for a team that is a member of what conference ?

Context paragraphs:
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.

Chet Gladchuk Jr.: Chester Stephen Gladchuk Jr. (born 1950) is an American college athletics administrator and former American football player and coach.  He is currently the athletic director at the United States Naval Academy, a position he has held since 2001.  Gladchuk served as the athletic director at Tulane University from 1988 to 1990, at Boston College from 1990 to 1997, and at the University of Houston from 1997 to 2001.  Gladchuk attended Worcester Academy and then played college football at Boston College from 1970 to 1972.  He coached high school football in New Hampton, New Hampshire before moving to the University of Massachusetts Amherst, where he worked as an assistant athletic director.  Gladchuck's father, Chet Gladchuk, also played college football at Boston College before playing professionally with the New York Giants of the National Football League (NFL) and the Montreal Alouettes of the Interprovincial Rugby Football Union, now part of the Canadian Football League (CFL).

Joe Ruetz: Joseph Hubert Ruetz (October 21, 1916 – January 2, 2003) was a professional football player in the All-America Football Conference (AAFC) for the Chicago Rockets in 1946 and 1948.  Prior to that he played college football while attending the University of Notre Dame.  He played guard for the Irish with the exception of playing one season at quarterback.  In 1938, he graduated from Notre Dame with cum laude honors.  Ruetz played in the 1938 College All-Star Game and his team upset Sammy Baugh and the Washington Redskins.  During World War II, he was a Navy physical education instructor and pilot.  During that time he played for the famed Saint Mary's Pre-Flight football team.  He was named an All-Navy All-American by sportswriter Grantland Rice in 1942.  After the war, Ruetz studied at the University of Chicago and played two seasons with the Chicago Rockets of the All-America Football Conference.  In 1950, he then was an assistant and head coach at St. Mary's before joining Chuck Taylor's football staff at Stanford University and helping guide the team to the 1952 Rose Bowl.  Ruetz later worked as a fund-raiser for Cardinal athletics, before succeeding Taylor as athletic director in 1972.  He then "saved" the East-West Shrine Game by convincing Stanford to allow it to be played at the school, where it remained until its move to Pacific Bell Park in 2001.  Joe also launched the head coaching career of Bill Walsh in 1977, when he hired him as Stanford's football coach.  He also instituted a long football series with Notre Dame, before retiring in 1979.  He later served as a fund-raising consultant to the Psoriasis Research Institute in Palo Alto, California.

Whitey Wistert: Francis Michael "Whitey" Wistert (February 20, 1912 – April 23, 1985) was an American football and baseball player.  He played college football and college baseball at the University of Michigan.  Wistert was the first of the three Wistert brothers—he was succeeded by Albert (Al) and Alvin—who were named All-American tackles at Michigan and later inducted into the College Football Hall of Fame.  He was elected to the College Football Hall of Fame in 1967.  During his time at Michigan, Wistert played on three consecutive Big Ten Conference football championships teams, including two that won back-to-back national championships.  He was also Big Ten Conference MVP in baseball in college and later played for Major League Baseball's Cincinnati Reds.  The Wistert brothers all wore jersey No. 11 at Michigan and are among the seven players who have had their numbers retired by the Michigan Wolverines football program.  Their number will be put back into circulation starting on November 10, 2012 before a Michigan home game against Northwestern as part of the Michigan Football Legend program.

Stephen Alexander (American football): Stephen Todd Alexander (born November 7, 1975) is a former American football tight end.  He was originally drafted by the Washington Redskins in the second round of the 1998 NFL Draft.  He played college football at Oklahoma.

Mackensie Alexander: Mackensie Alexander (born November 12, 1993) is an American football cornerback for the Minnesota Vikings of the National Football League (NFL).  Alexander played college football at Clemson University, where after redshirting his freshman season, became a key role player on the Tigers' defense his second season, earning freshman All-American honors.  Entering his sophomore season, he was a key part of the Tigers's defense, which was ranked among the best in all of college football.  Alexander was drafted by the Vikings in the second round, 54th overall of the 2016 NFL Draft.

Carroll Fighting Saints football: The Carroll Fighting Saint football program represents Carroll College of Helena, Montana in college football.  The team competes in the Frontier Conference, which is affiliated with the National Association of Intercollegiate Athletics (NAIA).  The Carroll Fighting Saints football team began playing in 1920 and is one of the most successful programs in the NAIA division of college football.  The program has won six NAIA Football National Championships (2002, 2003, 2004, 2005, 2007, 2010) and 40 conference championships, 14 while a member of the Montana Collegiate Conference and 26 as a member of the Frontier Conference.  The team is currently coached by Mike Van Diest who in his 17th season at Carroll, has compiled a career record of 194– 36.  His winning percentage of .8145 is the third highest of any head coach with at least ten seasons of experience in college football history, behind only those of Mount Union's Larry Kehres and Notre Dame's Knute Rockne.  The Carroll College Fighting Saints plays their home games on campus at Nelson Stadium.

Stephen Sieradzki: Stephen Henry Sieradzki (April 5, 1923 – May 1968) was an American football player.  He played college football for Michigan State College (later known as Michigan State University) in 1946 and 1947.  He also played also played college baseball for Michigan State.  He played professional football in the National Football League for the New York Yankees (NFL) in 1948.  He was released by the Brooklyn Dodgers of the All-American Football Conference in April 1949.

Jackie Fellows: Jack Byron "Jackie" Fellows (January 8, 1922 – July 24, 1993) was an American football player.  He played college football for Los Angeles City College, was selected to the Little All-American team and led the team to the national junior college football championship.  He transferred to California State University, Fresno and played for the Fresno State Bulldogs football team.  During the 1942 college football season, Fellows led Fresno State to a 9-1 record, rushed for 599 yards and completed 82 of 195 passes for 1,314 yards.  He also broke Davey O'Brien's single-season record by throwing 23 touchdown passes.  He was selected by both "Look" magazine and Maxwell Stiles as a first-team halfback on the 1942 College Football All-America Team.  After graduating from college, Fellows was draft in the sixth round of the 1944 NFL Draft by the Washington Redskins, but did not play in the National Football League (NFL).  In 1947, Fellows played for the Ottawa Rough Riders of the Canadian Football League (CFL).  In 1984, Fellows was inducted into the Fresno County Athletic Hall of Fame.

George Munger (American football): George Almond Munger (June 24, 1909 – July 21, 1994) was an American athlete, coach and athletic director.  He played college football and competed in track and field at the University of Pennsylvania from 1930 to 1933.  He returned to Penn as head coach of the football team from 1938 to 1953 and as director of physical education from 1954 to 1974.  His 1945 and 1947 teams finished ranked among the top ten college football teams in the United States, and he coached five players who were inducted into the College Football Hall of Fame and three who received the Maxwell Award as the best player in college football.  Munger was inducted in the College Football Hall of Fame in 1976.  The Maxwell Football Club has present the George Munger Award each year since 1989 to the national college football coach of the year.

Supporting paragraphs: Stephen Alexander (American football) Oklahoma Sooners football
Answer: Big 12 Conference