Conversation so far:
How many celebrities did Oprah have on her show
Winfrey interviewed a plethora of public figures and everyday people during the show's 25-year history.
Did the celebrities do anything special for Oprah's show
Winfrey sat down in a prime-time special broadcast with Michael Jackson. Jackson, an intensely private entertainer, had not given an interview in 14 years
When was Michael Jackson on Oprah's show
On February 10, 1993

Question: When was Taylor on her show
Self-contained rewrite: When was Elizabeth Taylor on Oprah's show