Question: When did the husband of Galina Vishnevskaya leave Russia with Elena Rostropovich and her parents?

Context articles: Charles E. Shulman
Britten's War Requiem (1963 recording)
Galina Vishnevskaya (biathlete)
Schuch
Aleksandra Rebenok
Rostropovich-Vishnevskaya Foundation
Mila Vilotijević
Galina Vishnevskaya
Louise Chevalier
Elena Rostropovich

Charles Emanuel Shulman was born in Berdichev, Ukraine, Russia, on July 25, 1900.
 (However, his official Russian birth certificate, presented to the family following his death, recorded his birth date as July 3, 1898.)
.
 Both parents were very religious Jews.
 His mother, Rachel Nemerov Shulman, brought all of her six children to the United States in 1904.
 His father, Maurice (Elimelech), a peddlar, had refused to leave Russia and died either shortly before or after the family left for America.
 The family settled in Cleveland, Ohio.
 They were very poor and Charles, the fifth of the six siblings, worked a newspaper route from a very young age to help meet the family's financial needs.
Britten's War Requiem (1963) is the first recording of Britten's War Requiem.
 It featured Galina Vishnevskaya, Dietrich Fischer-Dieskau and Peter Pears with the London Symphony Orchestra and The Bach Choir and was conducted by Britten himself.
 The recording took place in the Kingsway Hall in London and was produced by John Culshaw for Decca.
 Within five months of its release in May 1963 it sold 200,000 copies, an unheard-of number for a piece of contemporary classical music at that time.
Galina Vishnevskaya (born 10 February 1994) is a Kazakhstani biathlete.
 She competed at the 2014 Winter Olympics in Sochi, in the women's individual and sprint competitions.
The Schuch family has its own Coat of Arms and the family title of Baron.
 The Schuch Family originated from the South part of Lake Baikal near China, in 1200.
 The ancestors came to Kiev in Ukraine in 1227, with Genghis Khan as Warlords.
 Then moved to Pest (part of contemporary Budapest) in Hungary in 1237, and afterwards moved to Vác to the North of Pest and alongside Donau River, where the family owned a palace.
 That was later sold to a relative, Baron Einantel.
 They in turn moved to Poland to Szynczyce, in 1807.
 The spelling of the name was changed after the move from Schuch to Szuch.
 Family had its palace at Aleja Szucha Nr 6 in Warszawa (Polish: "" ), and another one in Nowy Swiat Nr 70, also in Warszawa.
 The Family owned together with the Nobel family(Swedish) oil fields in Baku, Russia.
 The Family purchased from Fürst Ysipov his palace at Yalta when he shot Mr Rasputin in St. Petersburg and needed to leave Russia in a haste.
 This palace was known as the Livadia Palace.
 Family had to leave in a haste at arrival of the Red Guard in 1917, at the time of the Russian revolution.
 This palace was a place of the meeting place for Sir Winston Churchill, President Franklin D. Roosevelt and Chairman Joseph Stalin, at the Yalta conference.
Aleksandra was born May 6, 1980 in Moscow in the family of the candidate physical and mathematical sciences and technologies and designer clothes.
 In 1994 she graduated from the Children's Art School number 1.
 In 1997, she graduated from the educational complex (named after Galina Vishnevskaya) in piano.
 From 1997 to 1999 she studied at the Moscow State Art and Cultural University, graduated from the 2nd year on the director's faculty on a specialty the director of the theater.
"This article is about The Rostropovich-Vishnevskaya Foundation, a non-profit organization.
 For articles on the cellist and composer Mstislav Rostropovich, see Rostropovich, and for articles on the soprano Galina Vishnevskaya, see Vishnevskaya."
Mila Vilotijević (; born 1953) is a Serbian soprano.
 She was born in Belgrade and graduated from the Academy of Music of the University of Belgrade with Irina Ariskin.
 In 1989 she was awarded her diploma from the "Luigi Cherubini" Florence Conservatory, Florence Italy with Renata Ongaro and Liliana Poli.
 During her career she was mentored by Elly Ameling, Julia Hamari, Galina Vishnevskaya, Sena Jurinac, Lora Fisher, Irwin Gagge, and Giorgio Favaretto.
 She performs a vast repertory of music: opera, oratorio and "lieder" from the Baroque to the present As active solo singer, she participated in the most important music festivals in Europe including Florence ("La Damnation de Faust" under Myung-Whun Chung and "Der Freischütz" under Wolgang Sawallisch) and Salzburg (Tchaikovsky's "Yolanta" with Galina Vishnevskaya at the Mozarteum).
 From 1998 she is a "soprano I del Teatro alla Scala di Milano".
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.
 She was the wife of cellist Mstislav Rostropovich, and mother to their two daughters, Olga and Elena Rostropovich.
Louise Chevalier (1774 - died after 1801), was a French actor and opera singer.
 She was active in Russia in the French theater troupe of her spouse, the ballet dancer and playwright (Pierre Peicam), from 1797 until 1801.
 During her tenure in Russia, she was the lover of first the Master of the Stables, the court noble and emperor's favorite Ivan Kutaisov, and then of emperor Paul I of Russia.
 She was an important figure during the reign of Paul I, when she wielded great influence as a channel for supplicants to Kutaisov and the emperor, and reportedly accepted substantial sums as such, and attracted great animosity in St Petersburg.
 After the fall of Paul I in March 1801, she was asked to leave Russia by czar Alexander.
 It is not confirmed what happened to her after this, though conflicting reports place her as a courtesan and a spy in Paris, in Germany and in Poland.
Elena Rostropovich is a pianist who was born in Moscow, Russia on June 22, 1958.
 She left Russia with her parents, cellist and conductor Mstislav Rostropovich and soprano Galina Vishnevskaya in 1974.