Please answer the following question: Information: - The 1980 Summer Olympics, officially known as the Games of the XXII Olympiad, was an international multi-sport event held in Moscow, Soviet Union, in present-day Russia. - Nadia Elena Comneci (born November 12, 1961) is a Romanian former gymnast who, at the age of 14, became the first gymnast in Olympic history to be awarded the perfect score of 10.0 at the 1976 Summer Olympics in Montreal. She would eventually go on to receive six more perfect 10s in Montreal as well as three gold medals. Four years later, she won two gold medals at the 1980 Summer Olympics in Moscow. She won a total of nine Olympic medals and four World Championship medals during her career. Comneci is one of the best-known gymnasts in the world and is credited with popularizing the sport around the world. In 2000, she was named as one of the Athletes of the 20th Century by the Laureus World Sports Academy. She has lived in the United States since 1989 and is married to American Olympic gold medalist Bart Conner. - Kolleen Casey Shields ( born 1959 in St. Paul , Minnesota ) was a gymnast who competed for the United States in the 1976 Montreal Olympics . She finished 41st in the vault , an event won by Nadia Comneci . She was the 1975 U.S. national champion in vault . Shields competed for Southwest Missouri State University from 1977 to 1979 . She transferred to the University of Minnesota , graduating with a degree in Physical Therapy . Shields became a physical therapist at the University of Iowa . - The 1976 Summer Olympics, officially called the Games of the XXI Olympiad (French: Les "XXIes olympiques d'ete"), was an international multi-sport event in Montreal, Quebec, in 1976, and the first Olympic Games held in Canada. Montreal was awarded the rights to the 1976 Games on May 12, 1970, at the 69th IOC Session in Amsterdam, over the bids of Moscow and Los Angeles. It is so far the only Summer Olympic Games to be held in Canada. Calgary and Vancouver later hosted the Winter Olympic Games in 1988 and 2010, respectively. - Bart Conner (born March 28, 1958) is an 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" Norman, Oklahoma along with his wife, Romanian Olympic medalist Nadia Comneci. In addition, both Comneci and Conner are highly involved with "The Special Olympics." After reading the paragraphs above, we are interested in knowing the entity with which 'kolleen shields' exhibits the relationship of 'participant of'. Find the answer from the choices below. Choices: - 1976 summer olympics - 1980 summer olympics - olympic games - sport
A:
1976 summer olympics