At what school did Nat Dye's brother serve as athletic director from 1981 to 1991?
Nat Dye: Nat Dye (born c. 1937) is a retired Canadian football player who played for the Edmonton Eskimos and Saskatchewan Roughriders. Nat Dye:  He is the brother of Pat Dye. Pat Dye:  He served as the head football coach at East Carolina University (1974–1979), the University of Wyoming (1980), and Auburn University (1981–1992) compiling a career college football record of 153–62–5. Pat Dye:  He served as the athletic director at Auburn from 1981 to 1991 and was inducted into the College Football Hall of Fame as a coach in 2005.
Auburn