Question: Information:  - 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, British Columbia, 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 sled, sledge, or sleigh is a land vehicle with a smooth underside or possessing a separate body supported by two or more smooth, relatively narrow, longitudinal runners that travels by sliding across a surface. Most commonly sleds are used on snow or ice, however in certain cases they may be used on any surfaces, especially on ones with relatively low friction, such as sand or wet grass. They may be used to transport passengers, cargo, or both. Shades of meaning differentiating the three terms often reflect regional variations depending on historical uses and prevailing climate.  - Manuel Pfister (born December 4, 1988) is an Austrian luger who has competed since 1999. His best finish at the FIL World Luge Championships was 17th in the men's singles event at Oberhof in 2008.  - A luge is a small one- or two-person sled on which one sleds supine (face up) and feet-first. Steering is done by flexing the sled's runners with the calf of each leg or exerting opposite shoulder pressure to the seat. Racing sleds weigh 2125 kilograms (4655 lb) for singles and 2530 kilograms (5566 lb) for doubles. Luge is also the name of an Olympic sport. Lugers can reach speeds of 140 km per hour (87 mph). Manuel Pfister of Austria, reached a top speed of 154 km per hour (95.69 mph) on the track in Whistler, Canada prior to the 2010 Winter Olympics. Lugers compete against a timer, and on artificial tracks they are timed to a thousandth of a second, making luge one of the most precisely timed sports in the world. The first recorded use of the term "luge" is 1905, from the Savoy/Swiss dialect of French "luge" meaning "small coasting sled", and is possibly from a Gaulish word with the same root as English sled.  - Canada (French: ) is a country in the northern half of North America. Its ten provinces and three territories extend from the Atlantic to the Pacific and northward into the Arctic Ocean, covering , making it the world's second-largest country by total area and the fourth-largest country by land area. Canada's border with the United States is the world's longest land border. The majority of the country has a cold or severely cold winter climate, but southerly areas are warm in summer. Canada is sparsely populated, the majority of its land territory being dominated by forest and tundra and the Rocky Mountains. About four-fifths of the country's population of 36 million people is urbanized and live near the southern border. Its capital is Ottawa, its largest city is Toronto; other major urban areas include Montreal, Vancouver, Calgary, Edmonton, Quebec City, Winnipeg and Hamilton.  - Tristan Walker ( born May 16 , 1991 ) is a Canadian luger who has competed since 2008 . He has three Luge World Cup double 's podiums finish and was 8th in men 's doubles at Cesana in the 2011 World Championships . Walker qualified for the 2010 Winter Olympics where he finished 15th . Walker also qualified for the 2014 Winter Olympics in Sochi , Russia . He competed in both the Doubles race and the Team Relay ( which made its Olympic appearance in 2014 ) . He and his teammate Justin Snith missed the podium in the doubles event by just five - one hundredths ( 0.05 ) of a second for the best - ever Olympic result by a Canadian sled in the event . They joined Alex Gough and Samuel Edney and had another Olympic fourth place finish . The team has won silver at the 2013 World Championships following bronze in 2012 .    Given the information above, choose from the list below the object entity that exhibits the relation 'place of birth' with the subject 'tristan walker'.  Choices: - best  - british columbia  - calgary  - canada  - columbia  - edmonton  - forest  - montreal  - most  - of  - richmond  - savoy  - toronto  - vancouver  - west vancouver  - whistler
Answer:
calgary