Question: How many nations participated in the Winter Olympics where Jesse Väänänen placed 22nd in the individual sprint event?

Context articles: Yuichi Onda
Magdalena Pajala
Biathlon at the Winter Olympics
Virpi Sarasvuo
Jesse Väänänen
2010 Winter Olympics
Paul Murray (skier)
Anti Saarepuu
Øystein Pettersen
Man Dandan

Yuichi Onda (恩田 祐一 , Onda Yūichi ) (born June 24, 1980) is a Japanese cross-country skier who has competed since 1999.
 Competing in two Winter Olympics, he earned his best finish of 12th in the team sprint event at Turin in 2006 while his best individual finish was 17th in the individual sprint event at Vancouver four years later.
Emma Magdalena Sven-Eriksdotter Pajala, born March 11, 1988 in Gällivare, Sweden, is a Swedish female cross country skier.
 She has competed in the World Cup since 2008.
 In January 2010, Pajala participated in the 2009-10 Tour de Ski and won the sprint event in the Swedish National Championship.
 In Tour de Ski, she finished ninth in the freestyle sprint and 10 km classical events, and ended up at 36th place in the overall rankings.
 At the 2010 Winter Olympics, Pajala finished fifth in the 4 x 5 km relay and tenth in the individual sprint event.
 Her best World Cup finish is fourth place at a sprint event in Drammen, Norway in March 2010.
Biathlon debuted at the 1960 Winter Olympics in Squaw Valley with the men's 20 km individual event.
 At the 1968 Winter Olympics in Grenoble, the men's 4×7.5 km relay debuted, followed by the 10 km sprint event at the 1980 Winter Olympics in Lake Placid, New York.
 Beginning at the 1992 Winter Olympics in Albertville, women's biathlon debuted with the 15 km individual, 3×7.5 km relay (4×7.5 km during 1994-2002, and 4×6 km in 2006), and 7.5 km sprint.
 A pursuit race (12.5 km for men and 10 km for women) was included at the 2002 Winter Olympics in Salt Lake City.
 The top 60 finishers of the sprint race (10 km for men and 7.5 km for women) would qualify for the pursuit event.
 The sprint winner starts the race, followed by each successive biathlete at the same time interval he/she trailed the sprint winner in that event.
 At the 2006 Winter Olympics in Turin, a mass start (15 km for men and 12.5 km for women) was introduced where the top 30 biathletes from the previous four events were allowed to start together for the competition.
Virpi Katriina Sarasvuo (née Kuitunen, born 20 May 1976) is a Finnish former cross-country skier who competed from 1995 to 2010.
 She won a bronze medal in the team sprint event (with Aino-Kaisa Saarinen) at the 2006 Winter Olympics in Turin and earned her best individual finish of fifth in the individual sprint event in those same games.
 Four years later in Vancouver, Kuitunen won another bronze, this time in the 4 × 5 km relay.
Jesse Väänänen (born January 6, 1984 in Lahti) is a Finnish cross country skier who has competed since 2003.
 He finished 22nd in the individual sprint event at the 2010 Winter Olympics in Vancouver.
The 2010 Winter Olympics, officially known as the XXI Olympic Winter Games (French: Les "XXIes Jeux olympiques d'hiver") and commonly known as Vancouver 2010, informally the 21st Winter Olympics, were a major international multi-sport event held from February 12 to 28, 2010, in Vancouver, Canada, with some events held in the surrounding suburbs of Richmond, West Vancouver and the University Endowment Lands, and in the nearby resort town of Whistler.
 Approximately 2,600 athletes from 82 nations participated in 86 events in fifteen disciplines.
 Both the Olympic and Paralympic Games were organized by the Vancouver Organizing Committee (VANOC), headed by John Furlong.
 The 2010 Winter Olympics were the third Olympics hosted by Canada and the first by the province of British Columbia.
 Previously, Canada hosted the 1976 Summer Olympics in Montreal, Quebec, and the 1988 Winter Olympics in Calgary, Alberta.
 Vancouver is the largest city to host the Winter Olympics, a title soon to be turned over to Beijing in 2022.
Paul Murray (born 8 May 1977) is an Australian cross-country skier who has competed since 1997.
 Competing in two Winter Olympics, he earned his best finish of 20th in the team sprint event at Vancouver in 2010 while earning his best individual finish of 51st in the individual sprint event at Turin four years earlier.
Anti Saarepuu (born March 26, 1983 in Võru) is an Estonian cross-country skier who has competed since 2003.
 He competed at the 2006 Winter Olympics in Turin.
 He represents Estonia at the 2010 Winter Olympics in Vancouver.
 Saarepuu's best finish at the Winter Olympics was eighth in the individual sprint event at Turin in 2006.
Øystein "Pølsa" Pettersen (born 19 January 1983 in Linderud) is a Norwegian cross country skier who has competed since 2002.
 He has four World Cup podiums, his best finish being second in individual sprint events (2006: Germany, 2009: Estonia).
 He and Petter Northug won gold in the team sprint event at the 2010 Winter Olympics in Vancouver, Canada.
 In the Individual Sprint he was one of three Norwegians to reach the six-man final.
Man Dandan (; born May 5, 1989 in Harbin, Heilongjiang) is a Chinese cross country skier who has competed since 2006.
 Competing in two Winter Olympics, she earned her best finish of 17th in the team sprint event at Vancouver in 2010 and earned her best individual finish of 51st in the individual sprint event at the same games.