Conversation so far:
what is saturday night live?
a television show.
Are there any other interesting aspects about this article?
Over his four-year tenure at SNL, Belushi developed a series of successful characters.
which characters?
the belligerent Samurai Futaba, Henry Kissinger, Ludwig van Beethoven, the Greek owner of the Olympia Cafe, Captain James T.
Kirk.

Question: who did he work with?
Self-contained rewrite: who did John Belushi work with?