Question: Whose assassination did the son of Yusupov Palace participate in?
Sentence (from "Felix Yusupov"): Prince Felix Felixovich Yusupov, Count Sumarokov-Elston (Russian: Князь Фе́ликс Фе́ликсович Юсу́пов, Граф Сумаро́ков-Эльстон ; 23 March [O.S. 11 March] 1887 – 27 September 1967) was a Russian aristocrat, prince and count from the Yusupov family, best known for participating in the assassination of Grigori Rasputin.
Relevant evidence: Yes