Conversation so far:
Who created Marge Simpson?
Matt Groening first conceived Marge and the rest of the Simpson family in 1986 in the lobby of producer James L. Brooks' office.
What year was Marge Simpson created?
1986
Where did Marge Simpson first appear?
Marge debuted with the rest of the Simpson family on April 19, 1987.

Question: Who was she modeled after?
Self-contained rewrite: Who was Marge Simpson modeled after?