Question: Paul Ziert is a former University of Oklahoma gymnastics coach, Ziert recruited which retired American Olympic gymnast, to the school?
Context: Ernestine Jean Russell (born June 10, 1938), later known by her married names Ernestine Carter and Ernestine Weaver, is a Canadian former gymnast and American former college gymnastics coach.  She represented Canada in the 1956 and 1960 Summer Olympics.  Although Russell won no medals in her two Olympic appearances, she is regarded as Canada's first notable female Olympic gymnast and contributed significantly to the growing popularity of women's gymnastics in Canada and the United States. Jaycie Lynn Phelps (born September 26, 1979 in Greenfield, Indiana, United States) is a retired American Olympic gymnast and member of the 1996 Olympic gold medal U.S. women's gymnastics team, the Magnificent Seven.  She is known for her consistency and clean lines in her gymnastics. Marie Roethlisberger (born May 12, 1966) is a former gymnast who was a 1984 United States Olympic gymnastics alternate.  She is almost completely deaf.  She is the daughter of United States 1968 Olympic Gymnast Fred Roethlisberger and the sister of 1992, 1996, and 2000 Olympic gymnast John Roethlisberger.  She was selected as a 1991 NCAA Top VI Award (now Top VIII) winner as one of the six top NCAA student-athletes and the 1991 female Walter Byers Scholarship winner as the National Collegiate Athletic Association's top scholar-athlete. Rhonda Faehn (born April 28, 1971) is an American college gymnastics coach and former college and elite gymnast.  Faehn was the head coach of the Florida Gators women's gymnastics team of the University of Florida for thirteen seasons, from 2003 to 2015.  As a gymnast, Faehn competed at the 1987 World Artistic Gymnastics Championships and was named as an alternate for the U.S team at the 1988 Olympic Games in Seoul, South Korea.  Faehn also competed collegiately, earning a scholarship to UCLA, where she attended from 1990 to 1994.  She is best known for leading the Florida Gators to twelve consecutive appearances in the National Collegiate Athletic Association (NCAA) Division I women's gymnastics tournament, and three consecutive NCAA championships in 2013, 2014 and 2015.  Faehn left the University of Florida in 2015 to become the Senior Vice President of USA Gymnastics, the governing body of gymnastics in the United States. Toshiko Shirasu-Aihara (白須-相原 俊子, born June 3, 1939) is a retired Japanese gymnast.  She competed in all artistic gymnastics events at the 1960 and 1964 Olympics and won a team bronze medal in 1964.  Her best individual achievements were fourth places on the vault and uneven bars in 1964.  Born Toshiko Shirasu she changed her last name after marrying Nobuyuki Aihara, a fellow Olympic gymnast.  Their son Yutaka Aihara won a bronze medal in gymnastics at the 1992 Olympics. Amanda Jayne Reddin OBE (born 6 June 1965), née Harrison, later Kirby, is a gymnastics coach, and former Olympic gymnast, for Great Britain.  Personal coach of many successful gymnasts, including three time world champion and Olympic medallist Beth Tweddle, two time Olympian Hannah Whelan and Olympian Jennifer Pinches.  Reddin coached for many years at the City of Liverpool Gymnastics Club.  She is now the Head National Coach for British Gymnastics. Paul Ziert is a former University of Oklahoma gymnastics coach.  Ziert recruited Bart Conner to the school.  In 1977 and 1978, Ziert's teams won the NCAA Men's Gymnastics championship. Bart Conner (born March 28, 1958) is a retired American Olympic gymnast.  As a member of the men's gymnastics team at the 1984 Summer Olympic Games, Conner won two gold medals.  He currently owns and operates the Bart Conner Gymnastics Academy in Norman, Oklahoma, along with his wife, Romanian Olympic gold medalist Nadia Comăneci.  In addition, both Comăneci and Conner are highly involved with the Special Olympics. Edward R. "Ed" Gagnier (born February 1, 1936) is a Canadian former gymnast and gymnastics coach.  He was a gymnast at the University of Michigan from 1956 to 1958.  He was selected as an All-American in 1956 and also became the first gymnast to represent Canada at the Olympic games.  He was the head coach of the gymnastics program at Iowa State University from 1961 to 1983 and led his teams to NCAA championships in 1971, 1973 and 1974.  He was inducted into the U.S. Gymnastics Hall of Fame in 1982. István Sárkány (] ; 5 August 1913 – 28 November 2009) was a Hungarian Olympic gymnast, Olympic judge, gymnastics coach and official.  Sárkány represented Hungary at the 1936 Berlin Summer Olympics at the age of 22.  He participated in all men's gymnastic events with highs of 29th in the Rings and 31st in the Vault competitions.  He placed 64th in the Men's All-around competition.
Answer: Bart Conner