Question: When did the husband of Galina Vishnevskaya leave Russia with Elena Rostropovich and her parents?
Sentence (from "Galina Vishnevskaya"): Galina Pavlovna Vishnevskaya (née Ivanova, Russian: Гали́на Па́вловна Вишне́вская ; 25 October 192611 December 2012) was a Russian soprano opera singer and recitalist who was named a People's Artist of the USSR in 1966.
Relevant evidence: No