Please answer the following question: Information: - Stephen Murray ( born 9 January 1980 in Newcastle , England ) is a former BMX Dirt rider . On Friday 22 June 2007 at the Dew Action Sports Tour BMX Dirt Finals in Baltimore , Maryland , Murray took a catastrophic fall attempting a double back flip on the final jump in the dirt section . He received career ending injuries to his spinal cord and vertebrae and is paralyzed below the shoulders . Recent reports have shown that he can shrug his shoulders , move his toes , his index , and thumb fingers . Murray was a seven - time expert British champion and six - time UK National champion before the age of 16 . During his professional BMX career , Murray was known for his double back flips , 360 back flips , and turndown back flips . He won the gold medal in BMX Dirt in the Summer 2001 X Games and won gold medals in BMX Dirt at the Gravity Games in back to back years ( 2001 and 2002 ) . He was nominated for ESPN ' BMX rider of the year ' . Murray is no longer married , but has two sons . He resides in Riverside , California . Since the accident , Murray worked closely with the doctor that treated Christopher Reeve after the actor 's accident left him quadriplegic . He now has limited movement in his toes and is also gaining more movements in his hands and hopes to move to a wheelchair that he can hand operate opposed to the one he currently has that he operates with his head . - The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a sovereign country in western Europe. Lying off the north-western coast of the European mainland, it includes the island of Great Britain (the name of which is also loosely applied to the whole country), the north-eastern part of the island of Ireland, and many smaller islands. Northern Ireland is the only part of the UK that shares a land border with another sovereign statethe Republic of Ireland. Apart from this land border, the UK is surrounded by the Atlantic Ocean, with the North Sea to its east, the English Channel to its south and the Celtic Sea to its south-south-west, giving it the 12th-longest coastline in the world. The Irish Sea lies between Great Britain and Ireland. With an area of , the UK is the 78th-largest sovereign state in the world and the 11th-largest in Europe. It is also the 21st-most populous country, with an estimated 65.1 million inhabitants. Together, this makes it the fourth most densely populated country in the European Union. - A BMX bike is an off-road sport bicycle used for racing and stunt riding. BMX means bicycle motocross. - 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. - England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west. The Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain (which lies in the North Atlantic) in its centre and south; and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight. - 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. - Scotland (Scots: ) is a country that is part of the United Kingdom and covers the northern third of the island of Great Britain. It shares a border with England to the south, and is otherwise surrounded by the Atlantic Ocean, with the North Sea to the east and the North Channel and Irish Sea to the south-west. In addition to the mainland, the country is made up of more than 790 islands, including the Northern Isles and the Hebrides. - The Isles of Scilly (or "") are an archipelago off the south western tip of the Cornish peninsula of Great Britain. It is the southernmost location in England and the United Kingdom, as well as the most westerly in England. - 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. - 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. - Wales is a country that is part of the United Kingdom and the island of Great Britain. It is bordered by England to the east, the Irish Sea to the north and west, and the Bristol Channel to the south. It had a population in 2011 of 3,063,456 and has a total area of . Wales has over of coastline and is largely mountainous, with its higher peaks in the north and central areas, including Snowdon, its highest summit. The country lies within the north temperate zone and has a changeable, maritime climate. - 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. 'stephen murray ' is related to which object entity through the relation of 'sport'? Choices: - bicycle motocross - cycle sport - motocross - road bicycle racing - sport - sprint - ultramarathon - united kingdom
A:
bicycle motocross