Conversation so far:
Where did Harold Ramis attend school?
Harold Ramis graduated from Stephen K. Hayt Elementary School in June 1958 and Nicholas Senn High School in 1962, and in 1966 from Washington University in St. Louis, Missouri.
Who did Harold Ramis perform with at Second City?
At Second City, Harold Ramis performed alongside John Belushi.

Question: What year(s) did he perform at Second City?
Self-contained rewrite: What year(s) did Harold Ramis perform at Second City?