Question: Patten gymnasium is in Evanstan, Illinois, United States on the campus of?
Sentence (from "1931 NCAA Swimming and Diving Championships"): The 1931 NCAA Swimming and Diving Championships were contested at Patten Gymnasium at Northwestern University in Evanston, Illinois as part of the eighth annual NCAA swim meet to determine the team and individual national champions of men's collegiate swimming and diving in the United States.
Relevant evidence: No