Question: How many public universities are a part of the system which held the 1949 NCAA Swimming and Diving Championships ?
Sentence (from "1949 NCAA Swimming and Diving Championships"): The 1949 NCAA Swimming and Diving Championships were contested in March 1949 at the Bowman Gray Pool at the University of North Carolina in Chapel Hill, North Carolina at the 13th annual NCAA-sanctioned swim meet to determine the team and individual national champions of men's collegiate swimming and diving in the United States.
Relevant evidence: Yes