Conversation so far:
Where did Ramis attend school?
Ramis had begun studying and performing with Chicago's Second City improvisational comedy troupe.
Who did he perform with at Second City?
I had been in Second City in the workshops already and Michael Shamberg and I had written comedy shows in college".

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