Question: Where are the headquarters of the league the Denver Pioneers play in?

Related documents: [0]  [DOC] The Denver Pioneers men's basketball team represents the University of Denver and competes in the NCAA Division I men's college basketball in Denver, Colorado. They are coached by second year head coach Rodney Billups and are members of the Summit League. They play their home games at Magness Arena. [END] 
[1]  [DOC] The Summit League, or The Summit, is an NCAA Division I intercollegiate athletic conference with its membership mostly located in the Midwestern United States from Indiana and Illinois on the East of the Mississippi River to the Dakotas and Nebraska on the West, with additional members in the Western state of Colorado and the Southern state of Oklahoma. Originally dubbed the Association of Mid-Continent Universities in 1982, on June 1, 2007, the conference changed its name from the Mid-Continent Conference. League headquarters are in Elmhurst, Illinois. [END]  
Answer: Elmhurst, Illinois
Elmhurst, Illinois