Conversation so far:
Where was theater's Michael Bennett born?
Michael Bennett was born Michael Bennett DiFiglia in Buffalo, New York.
When was theater's Michael Bennett born?
Michael Bennett was born April 8, 1943.
Who are theater's Michael Bennett's parents?
Michael Bennett was born to Helen (née Ternoff), and Salvatore Joseph DiFiglia.

Question: when did his career begin?
Self-contained rewrite: when did theater's Michael Bennett's career begin?