Question: What number was the Winter Olympic Games in which Yevgeniy Velichko represented Kazakhstan in cross-country skiing?

Context paragraphs:
Australia at the 1952 Winter Olympics: Australia's second Winter Olympic Games appearance was at the 1952 Winter Olympics in Oslo, Norway.  It was 16 years since Australia's last Winter Games, as the 1940 and 1944 Winter Olympics were cancelled, and Australia did not compete in the 1948 Winter Olympics.  Australia sent nine athletes and competed in alpine skiing, cross-country skiing, figure skating and speed skating.  Nancy Hallam and Gweneth Molony were Australia's first women athletes at the Winter Olympics.

Yevgeniy Velichko: Yevgeniy Velichko (born 1987) is a Kazakhstani cross-country skier.  He represents Kazakhstan at the 2010 Winter Olympics in Vancouver.

2010 Winter Olympics: 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.

Soldier Hollow: Soldier Hollow is a cross-country ski resort located 53 mi southeast of Salt Lake City in Wasatch Mountain State Park, Utah, United States.  The resort was created for the 2002 Winter Olympics, and during the games it hosted the biathlon, cross-country skiing and the cross country skiing portion of the Nordic combined events.  Since hosting the Olympics, it has been developed as a cross-country skiing, tubing, and snowshoeing resort, while featuring mountain biking and golfing in the summer.  On May 1, 2016, the venue operation contract transferred from the Soldier Hollow Legacy Foundation to the Utah Olympic Legacy Foundation, which owns and operates several Olympic and Paralympic legacy venues elsewhere in the state.

List of Olympic medalists in freestyle skiing: Freestyle skiing is one of the six skiing disciplines contested at the Winter Olympic Games, and one of the youngest.  In 1924, the first Winter Olympics featured Nordic skiing disciplines (cross-country skiing, ski jumping, and Nordic combined), while alpine skiing was first contested in 1936.  Only at the 1992 Winter Olympics, in Albertville, France, were freestyle skiing events first held as official medal events.  Before that, freestyle skiing was contested at the 1988 Winter Olympics as a demonstration sport, consisting of events for both men and women in three variants: moguls, aerials and ski ballet.  In Albertville, moguls was the first-ever official freestyle skiing medal event; aerials and ski ballet were also held but still as demonstration events.  The growing popularity of aerials convinced the International Olympic Committee (IOC) to add this freestyle discipline to the 1994 Winter Olympics official program.  Moguls and aerials have thus been contested at every Winter Games since.  Ski cross inclusion in the Winter Olympics program was approved at an IOC Executive Board meeting in November 2006, and the first events were held at the 2010 Winter Olympics.

List of Olympic venues in cross-country skiing: For the Winter Olympics, there are 22 venues that have been or will be used for cross-country skiing.  The first events took near the main stadium.  In 1936, the first efforts to hold all of Nordic skiing (Nordic combined, ski jumping) in one location took place.  This was repeated in 1952.  For the 1956 games, the venue was among the first in the Winter Olympics to meet the television needs of RAI, Italy's national broadcaster.  The 1956 venue was constructed in an oblong 250 by area in an east-west direction with the Grand Stands facing south.  A temporary venue was created for the 1960 Games which also included biathlon for the first time.  The first permanent Olympic venue in cross-country skiing took place in 1980.  For all of Nordic skiing and biathlon, the first time they were in the same location was at the 2010 Games.

Venues of the 1976 Winter Olympics: For the 1976 Winter Olympics in Innsbruck, Austria, a total of eight sports venues were used.  The games were originally awarded to Denver, Colorado in the United States in 1970, but they withdrew in the wake of Colorado residents voting against it for environmental and cost reasons in November 1972.  This led to the International Olympic Committee opening up the bids for the games again, eventually awarding them to Innsbruck in February 1973.  The Austrian city, having hosted the Winter Olympics in 1964, was in the process of having the venues used for those Games before Denver's with clear cutting of the alpine skiing venues, lessening of the amount of cross-country skiing routes, upgrading the ski jumps, adding lighting in the indoor sports arena to accommodate color television, and the construction of a combination bobsleigh and luge track.  After the 1976 Games, the venues have remained in use, hosting events in Nordic skiing and the sliding sports.  They hosted some of the events for the Winter Universiade in 2005 and seven of the eight venues served as host for the first Winter Youth Olympic Games in 2012.

Kazakhstan at the Paralympics: Kazakhstan, having become independent in 1991, made its Paralympic Games début at the 1994 Winter Paralympics in Lillehammer, with merely two athletes competing in cross-country skiing and biathlon.  The country has competed in every edition of the Summer and Winter Paralympics since then.  Kazakhstan has obtained only one Paralympic medal: a silver in cross-country skiing, won by Lubov Vorobieva during the country's inaugural participation in the Games in 1994.

Milanko Petrović: Milanko Petrović () (born September 21, 1988 in Sjenica) is a Serbian biathlete who participated at the 2010 Winter Olympics, becoming the first olympic biathlete for independent Serbia.  At the 2014 Winter Olympics he carried Serbian flag at the opening ceremony and competed in biathlon and cross-country skiing.  He represents Serbia at the Biathlon World Championships and he is a regular participant of the Biathlon World Cup and the first ever Serb to win World Cup points.  Occasionally, he competes in cross-country skiing.  At the 2013 Winter Universiade he made a remarkable success by winning first ever international medals for Serbia in biathlon and cross-country skiing.

Cross-country skiing (sport): The sport of cross-country skiing encompasses a variety of formats for cross-country skiing races over courses of varying lengths according to rules sanctioned by the International Ski Federation and by various national organizations, such as the U.S. Ski and Snowboard Association (USSA) and Cross Country Ski Canada.  International competitions include the FIS Nordic World Ski Championships, the FIS Cross-Country World Cup, and at the Winter Olympic Games.  Such races occur over homologated, groomed courses designed to support classic (in-track) and freestyle events, where the skiers may employ skate skiing.  It also encompasses cross-country ski marathon events, sanctioned by the Worldloppet Ski Federation, and cross-country ski orienteering events, sanctioned by the International Orienteering Federation.  Related forms of competition are biathlon, where competitors race on cross-country skis and stop to shoot at targets with rifles, and paralympic cross-country skiing that allows athletes with disabilities to compete at cross-country skiing with adaptive equipment.

Supporting paragraphs: Yevgeniy Velichko 2010 Winter Olympics
Answer: 21st