Question: The 1920 NCAA football season had no clear-cut champion, with the "Official NCAA Division I Football Records Book" listing California, Georgia, Harvard, Notre Dame, and Princeton as national champions, Notre Dame was led by its first Walter Camp All-American, nicknamed "The Gipper", who died before the year was over, his name?
Sentence (from "1920 college football season"): Only California and Princeton claim national championships for the 1920 season.
Relevant evidence: No