Question: Both Gustave Francoise Lussi and Dorothy Hamill were a part of what Olympic sport?

full_context: Document 1: Dorothy Hamill: 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.
Document 2: Cecily Morrow: Cecily Alexandra Morrow is a United States Figure Skating (USFS) gold medalist in figures and skating teacher. Cecily was born in 1958, and started skating at age three in Baltimore, Maryland with Bob and Joan Ogilvie. She trained with World and Olympic coaches Gustave Lussi in freeskating and figures, Carlo Fassi in figures, and Natalia Dubova in ice dance, to name a few. In addition, she has at least 25 years of extensive, off-ice dance training in ballet, jazz, modern, step-dance, and physical conditioning.
Document 3: Yuri Ovchinnikov (figure skater): Yuri Lvovich Ovchinnikov (Russian: Юрий Львович Овчинников ; born 3 June 1950 in Leningrad) is a Russian figure skating coach and former competitor for the Soviet Union. He is the 1975 European bronze medalist, 1976 Prize of Moscow News champion, and 1975 Soviet national champion. He represented the Soviet Union at the 1972 Winter Olympics, where he placed 12th, and at the 1976 Winter Olympics, where he placed 8th.
Document 4: Gisele Marvin: Gisele Marie "Gigi" Marvin (born March 7, 1987) is an American ice hockey player for the Boston Pride of the National Women's Hockey League. As a member of the United States national women's ice hockey team, Marvin won a silver medal at the 2010 Olympic Winter Games and the 2014 Winter Olympics. Her grandfather is Cal Marvin, the coach of the 1958 United States Men's National Ice Hockey Team and the manager of the 1965 United States Men's National Ice Hockey Team, is a member of the United States Hockey Hall of Fame. She hails from Warroad, Minnesota, in Roseau County, the same small town as 1960 gold medalists Bill and Roger Christian and 1980 gold medalist Dave Christian.
Document 5: Gustave Lussi: Gustave François Lussi (June 2, 1898 – June 23, 1993) was a figure skating coach. His students include many champions, such as Dick Button, Tenley Albright, Maria Jelinek / Otto Jelinek, Donald Jackson, Alena Vrzáňová, Ronald Robertson, Ronald Ludington, Barbara Ann Scott, David Jenkins, Hayes Jenkins, Emmerich Danzer, Dorothy Hamill, John Misha Petkevich, and John Curry.
Document 6: Eteri Tutberidze: Eteri Georgievna Tutberidze (Russian: Этери Георгиевна Тутберидзе ; born 24 February 1974) is a Russian figure skating coach. She coaches ladies' and men's singles.
Document 7: Jayne Torvill: Jayne Torvill, OBE (born 7 October 1957) is an English ice dancer. With Christopher Dean, she won a gold medal at the 1984 Winter Olympics and a bronze medal at the 1994 Winter Olympics.
Document 8: Sergei Grinkov: Sergei Mikhailovich Grinkov (Russian: Серге́й Миха́йлович Гринько́в , February 4, 1967 — November 20, 1995) was a Russian pair skater. Together with partner and wife Ekaterina Gordeeva, he was the 1988 and 1994 Olympic Champion and a four-time World Champion.
Document 9: Nancy Kerrigan: Nancy Ann Kerrigan (born October 13, 1969) is an American former figure skater. She won bronze medals at the 1991 World Championships and 1992 Winter Olympics, and a silver medal at the 1992 World Championships, before becoming the 1993 US National Champion.
Document 10: 1972 Prague Skate: 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.
Document 11: Sonja Henie: Sonja Henie (8 April 1912 – 12 October 1969) was a Norwegian figure skater and film star. She was a three-time Olympic Champion (1928, 1932, 1936) in Ladies' Singles, a ten-time World Champion (1927–1936) and a six-time European Champion (1931–1936). Henie won more Olympic and World titles than any other ladies' figure skater. At the height of her acting career, she was one of the highest paid stars in Hollywood and starred in a series of box-office hits, including "Thin Ice" (1937), "My Lucky Star" (1938), "Second Fiddle" (1939) and "Sun Valley Serenade" (1941).
Document 12: Irina Rodnina: Irina Konstantinovna Rodnina (Russian: Ирина Константиновна Роднина ; ] , born 12 September 1949) is a Russian politician and figure skater, who is the only pair skater to win 10 successive World Championships (1969–78) and three successive Olympic gold medals (1972, 1976, 1980). She was elected to the State Duma in the 2007 legislative election as a member of President Vladimir Putin's United Russia party. As a figure skater, she initially competed with Alexei Ulanov and later teamed up with Alexander Zaitsev. She is the first pair skater to win the Olympic title with two different partners, followed only by Artur Dmitriev.
Document 13: Sergei Dudakov: Sergei Viktorovich Dudakov (Russian: Сергей Викторович Дудаков ; born 13 January 1970) is a Russian figure skating coach and former competitor who represented the Soviet Union. He is the 1989 Golden Spin of Zagreb champion and a two-time (1989–90) Piruetten champion. He finished 7th at the 1987 World Junior Championships. He was coached by Viktor Kudriavtsev in Moscow.
Document 14: Lori Nichol: Lori Nichol is a Canadian figure skating choreographer and coach. She was a performer for the John Curry Company from 1983–1986 and won the silver medal at the World Professional Championships in 1983. She is a 4 time recipient of the Professional Skaters' Association's Choreographer of the Year Award and the 2010 recipient of the PSA Sonia Henie award for bringing positive and favorable recognition to the sport. She was elected to the Professional Skater's Association Hall of Fame as an Outstanding Contributor in 2011, the United States Figure Skating Association's Hall of Fame as an Outstanding Contributor in 2012, and the Skate Canada Hall of Fame as an Outstanding Contributor in 2012. In March 2014 she was elected into the World Figure Skating Hall of Fame.
Document 15: 1971 Prize of Moscow News: The 1971 Prize of Moscow News was the sixth edition of an international figure skating competition organized in Moscow, Soviet Union. It was held November 25–28, 1971. Medals were awarded in the disciplines of men's singles, ladies' singles, pair skating and ice dancing. Soviets swept the men's podium, led by Sergei Chetverukhin. The ladies' category was won by Marina Titova, who took the title for the second consecutive year. Olympic champions Ludmila Belousova / Oleg Protopopov won the pairs' title, defeating two pairs who had beaten them a year earlier. World champions Lyudmila Pakhomova / Alexander Gorshkov took gold in the ice dancing event for the third consecutive year.
ground_truth: figure skating