Please answer the following question: Information: - The Flag Football World Championship was created in 2002 in Cancun , Mexico , with six countries . In its 11th annual event , the 2010 World Cup of Flag Football Festival took place in Boston in July . In 2001 , the championships were held in Toronto , Canada , and played host to eight countries . The winner was Australia 's team the '' Roo Boys '' captained by Brendan Neighbour . The 2014 tournament will be held in Jerusalem , Israel . - Canadian football is a form of gridiron football played in Canada in which two teams of 12 players each compete for territorial control of a field of play long and wide attempting to advance a pointed prolate spheroid ball into the opposing team's scoring area (end zone). - Boston (pronounced ) is the capital and most populous city of the Commonwealth of Massachusetts in the United States. Boston is also the seat of Suffolk County, although the county government was disbanded on July 1, 1999. The city proper covers with an estimated population of 667,137 in 2015, making it the largest city in New England and the 23rd most populous city in the United States. The city is the economic and cultural anchor of a substantially larger metropolitan area known as Greater Boston, a Metropolitan Statistical Area (MSA) home to a census-estimated 4.7million people in 2014 and ranking as the tenth-largest such area in the country. Alternately, as a Combined Statistical Area (CSA), this wider commuting region is home to some 8.1million people, making it the sixth-largest as such in the United States. - 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. - Flag football is a version of US-American football or Canadian football where the basic rules of the game are similar to those of the mainstream game (often called "tackle football" for contrast), but instead of tackling players to the ground, the defensive team must remove a flag or flag belt from the ball carrier ("deflagging") to end a down. After reading the paragraphs above, we are interested in knowing the entity with which 'flag football world championship' exhibits the relationship of 'sport'. Find the answer from the choices below. Choices: - american football - football - united kingdom
Answer:
american football