I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "Schwarzenegger was a founding celebrity investor in the Planet Hollywood chain of international theme restaurants (modeled after the Hard Rock Cafe) along with Bruce Willis, Sylvester Stallone and Demi Moore. Schwarzenegger severed his financial ties with the business in early 2000. Schwarzenegger said the company had not had the success he had hoped for, claiming he wanted to focus his attention on "new US global business ventures" and his movie career."?
A:
Which founding celebrity investor was married to Willis?