Conversation so far:
When did she first take stage?
In 1907, Sophie Tucker made her first theater appearance, singing at an amateur night in a vaudeville establishment.
What did Sophie Tucker sing on stage at an amateur night in a vaudeville establishment?
Sophie Tucker's songs included I Don't Want to Get Thin and Nobody Loves a Fat Girl, But Oh How a Fat Girl Can Love.“
Was Sophie Tucker's stage performance well received at first?
Though Sophie Tucker was a hit, the other female stars refused to share the spotlight with her, and the company was forced to let her go.
When did Sophie Tucker find success on stage?
Sophie Tucker caught the attention of William Morris, future founder of the William Morris Agency, which would become one of the largest and most powerful talent agencies of the era.
Did Sophie Tucker perform with anyone else of note?
In 1921, Tucker hired pianist and songwriter Ted Shapiro as her accompanist and musical director.
What did Sophie Tucker do with Ted Shapiro?
Ted Shapiro became part of Sophie Tucker's stage act.

Question: What do you mean by that?
Self-contained rewrite: What do you mean by Ted Shapiro becoming part of Sophie Tucker's stage act?