Question: When did the husband of Nina Petrovna Khrushcheva die?

Context paragraphs:
Nina Petrovna Khrushcheva: Nina Petrovna Khrushcheva (née Kukharchuk; Russian: Нина Петровна Хрущёва, Кухарчук , Ukrainian: Ні́на Петрі́вна Хрущо́ва ; 14 April 1900 – 13 August 1984) was the third wife of the Soviet leader Nikita Khrushchev.

Nina L. Khrushcheva: Nina Lvovna Khrushcheva (Нина Львовна Хрущёва, /xrʊ.ˈɕo.və/) (born 1964) is a Russian American Professor of International Affairs at The New School, New York, USA, a Senior Fellow of the World Policy Institute, New York, USA, and a Contributing Editor to Project Syndicate: Association of Newspapers Around the World.

Nikita Khrushchev: Nikita Sergeyevich Khrushchev (15 April [O.S. 3 April] 1894  – 11 September 1971) was a Soviet politician who led the Soviet Union during part of the Cold War as the First Secretary of the Communist Party of the Soviet Union from 1953 to 1964, and as Chairman of the Council of Ministers, or Premier, from 1958 to 1964.  Khrushchev was responsible for the de-Stalinization of the Soviet Union, for backing the progress of the early Soviet space program, and for several relatively liberal reforms in areas of domestic policy.  Khrushchev's party colleagues removed him from power in 1964, replacing him with Leonid Brezhnev as First Secretary and Alexei Kosygin as Premier.

Street (Nina Hagen album): Street is the fifth studio album by German singer Nina Hagen released on July 23, 1991 by Mercury Records.  The album is produced by Zeus B. Held with songs written mostly by Hagen.  It features songs in both, English and German.  Hagen also worked with Anthony Kiedis and John Frusciante of Red Hot Chili Peppers or with English dance music producer Adamski, with whom she later recorded the song "Get Your Body".  After toning down her image with the release of her 1989 album "Nina Hagen", she kept on making more downtempo songs, this time, with elements of hip hop.  Three singles from the album were released, "In My World", "Berlin" and "Blumen Für Die Damen".  "Street" also contains a cover version of the hit song "Good Vibrations" by The Beach Boys.

The Wonderful Lies of Nina Petrovna: The Wonderful Lies of Nina Petrovna (German: Die wunderbare Lüge der Nina Petrowna) is a 1929 German silent drama film directed by Hanns Schwarz and starring Brigitte Helm, Francis Lederer and Warwick Ward.  It was the last big-budget silent film released by the leading German studio Universum Film AG before the transition to sound began with "Melody of the Heart".  The film premiered on 15 April 1929 at the Ufa-Palast am Zoo in Berlin.  It was amongst the most popular films released in Germany that year.

The Lie of Nina Petrovna: The Lie of Nina Petrovna (French:Le mensonge de Nina Petrovna) is a 1937 French drama film directed by Viktor Tourjansky and starring Isa Miranda, Fernand Gravey and Aimé Clariond.  It is a remake of the 1929 silent film "The Wonderful Lies of Nina Petrovna" with the setting moved from Tsarist Russia to Imperial Vienna.  The film's sets were designed by the art director Guy de Gastyne.

Arthur and Nina Zwebell: Arthur B. Zwebell (September 27, 1891 – January 29, 1973) and Nina L. Zwebell (January 5, 1895 - March 11, 1976), formerly Nina Jacobson, were a husband and wife architectural team known for their innovation in the design of courtyard apartments in Southern California.

Maria Lilina: Maria Petrovna Alexeyeva (Russian: Мария Петровна Алексева , née Perevoshchikova, Перевощикова, 21 June 1866 - 24 August 1943) was a Russian stage actress, associated with the Moscow Art Theatre, better known under her stage name Lilina (Лилина).  Konstantin Stanislavski, the MAT director, was her husband.  In 1933 Lilina was designated as a Meritorious Artist of RSFSR.

Nina Petrovna Valetova: Nina Petrovna Valetova (Russian: Нина Петровна Валетова ), or Nina Tokhtaman Valetova (Russian: Нина Тохтаман Валетова ), born November 19, 1958, is a Russian-American metaphysical realism painter.

Aurora Pavlovna Demidova: Princess and Countess Aurora Pavlovna Demidova (2/3 November 1873 in Kiev – 28 June (OS: 16 June) 1904 in Turin) was a Russian noblewoman of the Demidov family.  She was the daughter of Pavel Pavlovich Demidov, 2nd Prince of San Donato, and his second wife, Princess Elena Petrovna Troubetzkaya.  Her father was the son of the Swedish-Finnish philanthropist Aurora Karamzin and her Russian husband, Pavel Nikolaievich Demidov.

Supporting paragraphs: Nina Petrovna Khrushcheva Nikita Khrushchev
Answer: 11 September 1971