Question: Who did Anna Timiryova marry after Alexander Kolchak was executed?

full_context: Document 1: Nikolay and Medea Figner: Nikolay Figner (1857–1918), lyric tenor, and Medea Figner (1859–1952), mezzo-soprano, later soprano, were a husband-and-wife team of opera singers active in Russia between 1889 and 1904. Medea was Italian-born (her original surname was Mei) but she became completely Russianized after marrying Nikolay. They had separate careers before their wedding, and again after their divorce in 1904, but during the 15 years of their marriage they almost always sang in the same performances. They created the main tenor and soprano roles in two operas by Pyotr Ilyich Tchaikovsky – "The Queen of Spades" and "Iolanta" – and appeared in a number of other important Russian musical premieres.
Document 2: Canadian Siberian Expeditionary Force: The Canadian Siberian Expeditionary Force (also referred to as the Canadian Expeditionary Force (Siberia) or simply C.S.E.F.) was a Canadian military force sent to Vladivostok, Russia, during the Russian Revolution to bolster the allied presence, oppose the Bolshevik revolution and attempt to keep Russia in the fighting against Germany. Composed of 4,192 soldiers and authorised in August 1918, the force returned to Canada between April and June 1919. The force was commanded by Major General James H. Elmsley. During this time, the C.S.E.F. saw little fighting, with fewer than 100 troops proceeding "up country" to Omsk, to serve as administrative staff for 1,500 British troops aiding the anti-Bolshevik White Russian government of Admiral Alexander Kolchak. Most Canadians remained in Vladivostok, undertaking routine drill and policing duties in the volatile port city.
Document 3: Russian polar expedition of 1900–02: The Russian polar expedition of 1900–1902 was commissioned by the Saint Petersburg Academy of Sciences to study the Arctic Ocean north of New Siberian Islands and search for the legendary Sannikov Land. It was led by the Russian geologist and Arctic explorer Baron Eduard Toll on the ship "Zarya". Toll and his three assistants vanished in late 1902 while exploring Bennett Island. One of the key members of the expedition was Alexander Kolchak, then a young researcher and lieutenant of the Russian Navy, and later a ruler of Russia.
Document 4: Spring Offensive of the Russian Army (1919): The Spring Offensive of the Russian Army was an offensive of the Russian Army of the White movement led by Alexander Kolchak on the Eastern Front of the Russian Civil War between March and April 1919.
Document 5: The White Horse (series): The White Horse is a Russian TV serial broadcast in 1993. The film, in 10 episodes, was directed by Gelii Ryabov. It presents the Russian civil war in Siberia from 1917–1920 and the struggle of the White Russians under the command of Admiral Alexander Kolchak against the Bolshevik forces, until his final defeat.
Document 6: Anna Akhmatova: Anna Andreyevna Gorenko (23 June [O.S. 11 June] 1889 – 5 March 1966), better known by the pen name Anna Akhmatova ( ; Russian: Анна Ахматова , ] ), was a Russian modernist poet, one of the most acclaimed writers in the Russian canon.
Document 7: Anna Timiryova: Anna Vasilyevna Timiryova (Russian: Анна Васильевна Тимирёва ; July 18, 1893 Kislovodsk - January 31, 1975 Moscow) was a Russian poet. Born Anna Safonova, she was the daughter of composer Vasily Ilyich Safonov. At age 19 she married admiral Sergey Nikolayevich Timiryov, whom she divorced in 1918 to join her lover, Admiral Alexander Kolchak. After Kolchak's execution, she was arrested several times. In 1923 she married Vsevolod Kniper. She was the mother of the painter Vladimir Sergeyevich Timiryov
Document 8: The Admiral (2008 film): The Admiral (Russian: Адмиралъ Admiral) is a 2008 biopic about Alexander Kolchak, a vice-admiral in the Imperial Russian Navy and leader of the anti-communist White Movement during the Russian Civil War. The film also depicts the love triangle between the Admiral, his wife, and the poet Anna Timiryova.
Document 9: Evgenia Tur: Evgenia Tur (Russian: Евге́ния Тур ) (August 24, 1815 – March 27, 1892) was a Russian writer, critic, journalist and publisher. Her birth name was Elizaveta Vasilyevna Sukhovo-Kobylina. Her full married name was Countess Elizaveta Vasilyevna Salias De Tournemire. The novelist Evgeny Salias De Tournemire was her son. The playwright Aleksandr Sukhovo-Kobylin was her brother. Her sister, Sofia, was a painter of some note
Document 10: Alexander Kolchak: Alexander Vasilyevich Kolchak CB (Russian: Алекса́ндр Васи́льевич Колча́к , 16 November [O.S. 4 November] 1874 – 7 February 1920) was a polar explorer and commander in the Imperial Russian Navy, who fought in the Russo-Japanese War and the First World War. During the Russian Civil War, he established an anti-communist government in Siberia—later the Provisional All-Russian Government—and was recognised as the "Supreme Ruler and Commander-in-Chief of All Russian Land and Sea Forces" by the other leaders of the White movement from 1918 to 1920. His government was based in Omsk, in southwestern Siberia.
Document 11: Irina Alfyorova: Irina Ivanovna Alfyorova PAR (Russian: Ири́на Ива́новна Алфёрова ; born 13 March 1951, Novosibirsk, Soviet Union) is a Soviet and Russian actress. She was formerly married to Russian film and stage actor Aleksandr Abdulov, he adopted her daughter, Ksenia (from marriage to a Bulgarian diplomat Boyko Gyurov).
Document 12: Alexander Vasilyevich Belyakov: Alexander Vasilyevich Belyakov (Russian: Алекса́ндр Васи́льевич Беляко́в ; 21 December 1897 [O.S. 9 December] – 28 November 1982) was a Soviet flight navigator who, together with command pilot Valery Chkalov and co-pilot Georgy Baydukov, set a record for the longest uninterrupted flight in 1936 and made the first non-stop flight across the North Pole, flying from Moscow to Vancouver, Washington.
Document 13: Russian rescue expedition of 1903: The Russian rescue expedition of 1903 was commissioned by the Saint Petersburg Academy of Sciences to rescue the groups of Baron Eduard Toll and Alexei Byalynitsky-Birulya that were left near New Siberian Islands by the Russian polar expedition of 1900–1902. The expedition was organized and led by Alexander Kolchak, then a young researcher and lieutenant of the Russian Navy, and later a ruler of Russia.
Document 14: Sergei Efron: Sergei Yakovlevich Efron (Russian: Серге́й Я́ковлевич Эфро́н; 8 October 1893 – 16 October 1941), nicknamed Seryozha, was a Russian poet, officer of White Army and husband of Marina Tsvetaeva. While in emigration, he was recruited by the Soviet NKVD. After returning to USSR from France, he was executed.
Document 15: Marina Tsvetaeva: Marina Ivanovna Tsvetaeva (Russian: Мари́на Ива́новна Цвета́ева ; ] ; 8 October [O.S. 26 September] 1892 31 August 1941) was a Russian and Soviet poet. Her work is considered among some of the greatest in twentieth century Russian literature. She lived through and wrote of the Russian Revolution of 1917 and the Moscow famine that followed it. In an attempt to save her daughter Irina from starvation, she placed her in a state orphanage in 1919, where she died of hunger. Tsvetaeva left Russia in 1922 and lived with her family in increasing poverty in Paris, Berlin and Prague before returning to Moscow in 1939. Her husband Sergei Efron and her daughter Ariadna Efron (Alya) were arrested on espionage charges in 1941; and her husband was executed. Tsvetaeva committed suicide in 1941. As a lyrical poet, her passion and daring linguistic experimentation mark her as a striking chronicler of her times and the depths of the human condition.
ground_truth: Vsevolod Kniper