Question: Which 1972 skating competition included a skater who won in the 1976 Olympics?

Context articles: Irving Brokaw
Nobutaka Taguchi
1972 Prague Skate
U.S. Figure Skating Championships
Kenneth Shelley
Dorothy Hamill
1996 Canadian Figure Skating Championships
Iceberg Skating Palace
2007 Canadian Figure Skating Championships
FBMA Trophy

Isaac Irving Brokaw (March 29, 1871 – March 18, 1939) was an American figure skater, artist, lawyer, and financier.
 He represented the United States at the 1908 Summer Olympics in the figure skating competition, becoming the first American to compete in a sport included in the Winter Olympic program.
 After he won an international prize in Switzerland, he brought the International Style of skating back to the United States.
 His book, "Art of Skating" was known as the figure skater's bible.
Nobutaka Taguchi (田口信教 , Taguchi Nobutaka , born June 18, 1951) is a retired Japanese breaststroke swimmer.
 He competed in the 100 m and 200 m breaststroke and 4 × 100 m medley relay at the 1968, 1972 and 1976 Olympics and won two medals in 1972, a gold in the 100 m and a bronze in the 200 m events.
 His breaststroke gold medal was the first for Japan since 1956.
 He won during the five-year era dominated by John Hencken and David Wilkie.
 He also earned the bronze medal in the 200 m breaststroke at the 1972 Olympics and in both breaststrokes at the 1975 World Championships.
 He ended his career after the 1976 Olympics.
The 1972 Prague Skate was a senior international figure skating competition held 11–12 November 1972 in Czechoslovakia.
 Medals were awarded in the disciplines of men's singles and ladies' singles.
 Gold in both categories went to skaters from the United States.
 Future Olympic champion Dorothy Hamill won the ladies' title ahead of West Germany's Gerti Schanderl and Canada's Daria Prychun.
 Gordon McKellen took the men's title while Zdeněk Pazdírek of Czechoslovakia and Jacques Mrozek of France took silver and bronze, respectively.
The U.S. Figure Skating Championships is a figure skating competition held annually to crown the national champions of the United States.
 The competition is sanctioned by U.S. Figure Skating.
 In the U.S. skating community, the event is often referred to informally as "Nationals".
 Medals are awarded in four disciplines: men's (boys') singles, ladies' (girls') singles, pair skating, and ice dancing in four colors: gold (first), silver (second), bronze (third), and pewter (fourth) on five levels, senior, junior, novice, intermediate, and juvenile.
 The event is also used to determine the U.S. teams for the World Championships, World Junior Championships, Four Continents Championships, and Winter Olympics, however, U.S. Figure Skating reserves the right to consider other results.
Kenneth Gene Shelley (born October 4, 1951) is an American figure skater who competed in both singles and pairs.
 As a single skater, he won the 1972 United States Figure Skating Championships and placed 4th at the 1972 Winter Olympics.
 His highest placement at the World Figure Skating Championships was a single skater was 7th, in 1972.
 As a pair skater, he competed with JoJo Starbuck, with whom he is a three-time National Champion.
 Starbuck and Shelley competed in two Olympic Games, placing 13th in 1968 and 4th in 1972, and won two bronze medals at the World Figure Skating Championships.
 When they made the 1968 Olympic team, they were the youngest athletes the United States had ever sent to the Olympics.
Dorothy Stuart Hamill (born July 26, 1956) is a retired American figure skater.
 She is the 1976 Olympic champion and 1976 World champion in ladies' singles.
The 1996 Canadian Figure Skating Championships is an annual figure skating competition held by Skate Canada, the nation's figure skating governing body.
 Skaters compete at the senior, junior, and novice levels in the disciplines of men's singles, ladies' singles, pair skating, and ice dancing.
 There was also a senior fours competition.
 The top finishers are named to Canada's world team, which competes at the World Junior Figure Skating Championships, the Four Continents Figure Skating Championships, and the World Figure Skating Championships.
 The competition took place from February 7 to 11 in Ottawa, Ontario.
The Iceberg Skating Palace (Russian: Дворец Зимнего Спорта Айсберг) is a 12,000-seat multi-purpose arena at Sochi Olympic Park in Sochi, Russia.
 The venue hosted the figure skating and short track speed skating events at the 2014 Winter Olympics.
 It cost $43.9 million, including the temporary works for the Olympics.
 15,000 tonnes of steel were used.
 The environment was taken into consideration in its construction.
 A local figure skating competition was held in October 2012 but the International Skating Union said more work was needed to be ready for the 2012–2013 Grand Prix of Figure Skating Final, a test event in December 2012.
 At the Grand Prix Final, competitors said they liked the venue but some spectators complained about handrails obstructing the view in the upper tier.
 It takes about two hours to adjust the ice when switching from figure skating to short track or vice versa.
The 2007 Canadian Figure Skating Championships is an annual figure skating competition held by Skate Canada, the nation's figure skating governing body.
 Skaters compete at the senior and junior levels in the disciplines of men's singles, ladies' singles, pair skating, and ice dancing.
 The top finishers are named to Canada's world team, which competes at the World Junior Figure Skating Championships, the Four Continents Figure Skating Championships, and the World Figure Skating Championships.
 The competition took place from January 15 to 21 at the Halifax Metro Centre in Halifax, Nova Scotia.
The FBMA Trophy is an annual figure skating competition held in January in Abu Dhabi, United Arab Emirates.
 It is the only figure skating competition in the Arab world included in the International Skating Union's calendar.
 Medals are awarded in men's and ladies' single skating at various levels, including senior and junior.