Conversation so far:
Who is uri Geller?
self-proclaimed psychic Uri Geller.
how did he know johnny carson?
CANNOTANSWER.
Are there any other interesting aspects about this article?
Johnny had been a magician himself and was skeptical" of Geller's claimed paranormal powers.

Question: did he call out geller?
Self-contained rewrite: did Johnny Carson call out geller about his paranormal powers?