Question: When did Frédéric Prinz Von Anhalt's wife die?
Sentence (from "Frédéric Prinz von Anhalt"): Frédéric Prinz von Anhalt (born Hans Georg Robert Lichtenberg; June 18, 1943) is a German-American businessman best known as the last husband and widower of Zsa Zsa Gabor.
Relevant evidence: Yes