Conversation so far:
When was Krusty created?
Krusty first appeared in "The Krusty the Clown Show", one of The Simpsons shorts from The Tracey Ullman Show that first aired on January 15, 1989.
What did Krusty do in the episode?
CANNOTANSWER.

Question: Who voiced Krusty?
Self-contained rewrite: Who voiced Krusty?