generate questions: The Arena Football League (AFL) is the highest level of professional indoor American football in the United States. It was founded in 1987 by Jim Foster, making it the third longest-running professional football league in North America, after the Canadian Football League and the National Football League. It is played indoors on a 68-yard field (about half the distance of an NFL field), resulting in a faster-paced and higher-scoring game. The sport was invented in the early 1980s and patented by Foster, a former executive of the United States Football League and the National Football League.
When was the football league established? {sep_token} Where is football played? {sep_token} What does AFL sand for? {sep_token} Who founded The AFL? {sep_token} In what year was the AFL founded? {sep_token} In what decade was AFL sport invented? {sep_token} Who was the founder of the Arena Football League? {sep_token} What was the inaugural year of the AFL? {sep_token} Where does the Arena Football League rank amongst professional football leagues in North America by longevity? {sep_token} In yards, how large is an arena football field? {sep_token} What fraction of the size of an NFL football field is an arena football field? {sep_token}