Question: Whose assassination did the son of Yusupov Palace participate in?
Sentence (from "Livadia Palace"): The Yalta Conference was held there in 1945, when the palace housed the apartments of Franklin Delano Roosevelt and other members of the American delegation - the Russian delegation was housed in the Yusupov Palace, and the British in the Vorontsov Palace some five miles distant.
Relevant evidence: No