Conversation so far:
Where was Robert Rauschenberg born?
CANNOTANSWER.
When was his first art recognized?
In 1951 Rauschenberg had his first one-man show at the Betty Parsons Gallery.
What piece of art made him famous?
Rauschenberg showed Bed (1955), one of his first and certainly most famous Combines.

Question: Where was his first show?
Self-contained rewrite: Where was Robert Rauschenberg's first show?