Conversation so far:
when did Jesse Ventura become governor?
Jesse Ventura won the election in November 1998
what party is Jesse Ventura when he won the election in november 1998?
Jesse Ventura is part of the Reform Party of Minnesota
how long did Jesse Ventura serve as governor of Minnesota?
Jesse Ventura was governor of Minnesota from January 4, 1999 to January 6, 2003
what are some things Jesse Ventura did as governor of Minnesota?
During the first part of his administration, Jesse Ventura strongly advocated for land-use reform and substantial mass transit improvements, such as light rail.
how did Jesse Ventura shock the world?
Jesse Ventura shocked the world when he won the election for Governor of Minnesota
what did Jesse Ventura do before becoming governor of Minnesota?
Jesse Ventura was Mayor of Brooklyn Park
did Jesse Ventura serve his full term as Mayor of Brooklyn park?
Jesse Ventura served as mayor of Brooklyn park from 1991 to 1995

Question: how old was he at the time?
Self-contained rewrite: how old was Jesse Ventura at the time he was mayor of brooklyn?