query: sport mat hoffman
supports: The Choctaw (In the Choctaw language, Chahta) are Native American people originally from the Southeastern United States (modern-day Mississippi, Florida, Alabama, and Louisiana). The Choctaw language belongs to the Muskogean language family group.
  The Choctaw are descendants of the peoples of the Hopewell and Mississippian cultures, who lived throughout the east of the Mississippi River valley and its tributaries. About 1,700 years ago, the Hopewell people built Nanih Waiya, a great earthwork mound, which is still considered sacred by the Choctaw. The early Spanish explorers of the mid-16th century encountered Mississippian-culture villages and chiefs. The anthropologist John Swanton suggested that the Choctaw derived their name from an early leader. Henry Halbert, a historian, suggests that their name is derived from the Choctaw phrase "Hacha hatak" (river people). Motocross is a form of off-road motorcycle racing held on enclosed off-road circuits. The sport evolved from motorcycle trials competitions held in the United Kingdom. Mat Hoffman ( born January 9 , 1972 ) is an American BMX rider considered one of the best vert ramp riders in the history of the sport . He is nicknamed `` The Condor '' and runs the BMX Freestyle brand Hoffman BMX Bikes based out of Oklahoma City , OK . A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is used in the United States, Canada, Romania, China and Taiwan. In the United Kingdom and Ireland, county towns have a similar function. Oklahoma City is the capital and largest city of the state of Oklahoma. The county seat of Oklahoma County, the city ranks 27th among United States cities in population. The population grew following the 2010 Census, with the population estimated to have increased to 631,346 as of July 2015. As of 2015, the Oklahoma City metropolitan area had a population of 1,358,452, and the Oklahoma City-Shawnee Combined Statistical Area had a population of 1,459,758 (Chamber of Commerce) residents, making it Oklahoma's largest metropolitan area. BMX, an abbreviation for bicycle motocross, is a cycle sport performed on BMX bikes, either in competitive BMX racing or freestyle BMX, or else in general on- or off-road recreation. BMX began when young cyclists appropriated motocross tracks for fun, racing and stunts, eventually evolving specialized BMX bikes and competitions. A vert ramp is a form of half-pipe used in extreme sports such as vert skating, vert skateboarding and vert BMX. Oklahoma (Cherokee: "Asgaya gigageyi" /  ; or transliterated from English as  ("òàlàhoma"), Pawnee: "Uukuhuúwa", Cayuga: "Gahnawiyogeh") is a state located in the South Central United States. Oklahoma is the 20th-most extensive and the 28th-most populous of the 50 United States. The state's name is derived from the Choctaw words "okla" and "humma", meaning "red people". It is also known informally by its nickname, "The Sooner State", in reference to the non-Native settlers who staked their claims on the choicest pieces of land before the official opening date, and the Indian Appropriations Act of 1889, which opened the door for white settlement in America's Indian Territory. The name was settled upon statehood, Oklahoma Territory and Indian Territory were merged and Indian was dropped from the name. On November 16, 1907, Oklahoma became the 46th state to enter the union. Its residents are known as "Oklahomans", or informally "Okies", and its capital and largest city is Oklahoma City. A half-pipe is a structure used in gravity extreme sports such as snowboarding, skateboarding, skiing, freestyle BMX, and skating. The structure resembles a cross section of a swimming pool, essentially two concave ramps (or quarter-pipes), topped by copings and decks, facing each other across a flat transition, also known as a "tranny". Originally half-pipes were half sections of a large diameter pipe. Since the 1980s, half-pipes contain an extended "flat bottom" between the quarter-pipes; the original style half-pipes are no longer built. Flat ground provides time to regain balance after landing and more time to prepare for the next trick. Cycle sport is competitive physical activity using bicycles. There are several categories of bicycle racing including road bicycle racing, time trialling, cyclo-cross, mountain bike racing, track cycling, BMX, and cycle speedway. Non-racing cycling sports include artistic cycling, cycle polo, freestyle BMX and mountain bike trials. The Union Cycliste Internationale (UCI) is the world governing body for cycling and international competitive cycling events. The International Human Powered Vehicle Association is the governing body for human-powered vehicles that imposes far fewer restrictions on their design than does the UCI. The UltraMarathon Cycling Association is the governing body for many ultra-distance cycling races. A BMX bike is an off-road sport bicycle used for racing and stunt riding. BMX means bicycle motocross. BMX racing is a type of off-road bicycle racing. The format of BMX was derived from motocross racing. BMX bicycle races are sprint races on purpose-built off-road single-lap race tracks. The track usually consists of a starting gate for up to eight racers, a groomed, serpentine, dirt race course made of various jumps and rollers and a finish line. The course is usually flat, about wide and has large banked corners that help the riders maintain speed. 
  The sport of BMX racing is facilitated by a number of regional and international sanctioning bodies. They provide rules for sanctioning the conduct of the flying, specify age group and skill-level classifications among the racers, and maintain some kind of points-accumulation system over the racing season. The sport is very family oriented and largely participant-driven, with riders ranging in age from 2 to 70, and over. Professional ranks exist for both men and women, where the age ranges from 18 to 40 years old. Freestyle BMX is bicycle motocross stunt riding on BMX bikes. It is an extreme sport descended from BMX racing that consists of five disciplines: street, park, vert, trails, and flatland. Vert skateboarding is the act of riding a skateboard on a skate ramp or other incline and involves the skateboarder transitioning from the horizontal plane to the vertical plane in order to perform skateboarding tricks.
candidates: bicycle motocross cycle sport motocross motorcycle racing road bicycle racing skateboarding snowboarding spanish sport ultramarathon united kingdom
answer: bicycle motocross