Question: What is the native language of the author of Victims of Yalta?

full_context: Document 1: Victims of Yalta: Victims of Yalta (British title) or The Secret Betrayal (American title) is a 1977 book by Nikolai Tolstoy that chronicles the fate of Soviet citizens who had been under German control during World War II and at its end fallen into the hands of the Western Allies. According to the secret Moscow agreement from 1944 that was confirmed at the 1945 Yalta conference, all citizens of the Soviet Union were to be repatriated without choice—a death sentence for many by execution or extermination through labour.
Document 2: Munich Agreement: Joseph Stalin was also upset by the results of the Munich conference. The Soviets, who had a mutual military assistance treaty with Czechoslovakia, felt betrayed by France, who also had a mutual military assistance treaty with Czechoslovakia. The British and French, however, mostly used the Soviets as a threat to dangle over the Germans. Stalin concluded that the West had actively colluded with Hitler to hand over a Central European country to the Nazis, causing concern that they might do the same to the Soviet Union in the future, allowing the partition of the USSR between the western powers and the fascist Axis. This belief led the Soviet Union to reorient its foreign policy towards a rapprochement with Germany, which eventually led to the signing of the Molotov - Ribbentrop Pact in 1939.
Document 3: Nicolai Ivanovich Andrusov: He was born in Odessa, then a part of Russia. He studied geology and zoology at the Novorossia University in Odessa. He then traveled across Russia and central Europe to collect fossil specimens.
Document 4: Nikolai Tolstoy: Count Nikolai Dmitrievich Tolstoy-Miloslavsky (born 23 June 1935) is an English-Russian author who writes under the name Nikolai Tolstoy. A member of the Tolstoy family, he is a former parliamentary candidate of the UK Independence Party.
Document 5: Yevgeny Chichvarkin: He was a member of the Right Cause political party and was expected to become chairman of its Moscow section. Chichvarkin currently lives in London, from where he has campaigned against corruption in Russia and president Vladimir Putin personally.
Document 6: Nick Anstead: Nick Anstead was born in May 1982 and is a lecturer in the Department of Media and Communication at the London School of Economics, focusing on political communication. He was previously a politics lecturer at the University of East Anglia.
Document 7: Estonia: In the face of the country being re-occupied by the Red Army, tens of thousands of Estonians (including a majority of the education, culture, science, political and social specialists) chose to either retreat with the Germans or flee to Finland or Sweden where they sought refuge in other western countries, often by refugee ships such as the SS Walnut. On 12 January 1949, the Soviet Council of Ministers issued a decree "on the expulsion and deportation" from Baltic states of "all kulaks and their families, the families of bandits and nationalists", and others.
Document 8: Slavs: During World War II, Hitler's Generalplan Ost (general plan for the East) entailed killing, deporting, or enslaving the Slavic and Jewish population of occupied Eastern Europe to create Lebensraum (living space) for German settlers. The Nazi Hunger Plan and Generalplan Ost would have led to the starvation of 80 million people in the Soviet Union. These partially fulfilled plans resulted in the deaths of an estimated 19.3 million civilians and prisoners of war.
Document 9: War and Peace: War and Peace Front page of War and Peace, first edition, 1869 (Russian) Author Leo Tolstoy Original title Война и миръ Translator The first translation of War and Peace into English was by American Nathan Haskell Dole, in 1899 Country Russia Language Russian, with some French Genre Novel (Historical novel) Publisher The Russian Messenger (serial) Publication date Serialised 1865 -- 1867; book 1869 Media type Print Pages 1,225 (first published edition)
Document 10: Soviet Union: The Soviet Union suffered greatly in the war, losing around 27 million people. Approximately 2.8 million Soviet POWs died of starvation, mistreatment, or executions in just eight months of 1941 -- 42. During the war, the Soviet Union together with the United States, the United Kingdom and China were considered as the Big Four of Allied powers in World War II and later became the Four Policemen which was the foundation of the United Nations Security Council. It emerged as a superpower in the post-war period. Once denied diplomatic recognition by the Western world, the Soviet Union had official relations with practically every nation by the late 1940s. A member of the United Nations at its foundation in 1945, the Soviet Union became one of the five permanent members of the United Nations Security Council, which gave it the right to veto any of its resolutions.
Document 11: Molotov–Ribbentrop Pact: The treaty was published in the United States for the first time by the St. Louis Post-Dispatch on May 22, 1946, in Britain by the Manchester Guardian. It was also part of an official State Department publication, Nazi–Soviet Relations 1939–1941, edited by Raymond J. Sontag and James S. Beddie in January 1948. The decision to publish the key documents on German–Soviet relations, including the treaty and protocol, had been taken already in spring 1947. Sontag and Beddie prepared the collection throughout the summer of 1947. In November 1947, President Truman personally approved the publication but it was held back in view of the Foreign Ministers Conference in London scheduled for December. Since negotiations at that conference did not prove constructive from an American point of view, the document edition was sent to press. The documents made headlines worldwide. State Department officials counted it as a success: "The Soviet Government was caught flat-footed in what was the first effective blow from our side in a clear-cut propaganda war."
Document 12: Ivan Ivanovich Tolstoy: Count Ivan Ivanovich Tolstoy (1858—1916) was an Imperial Russian politician. He served as Vice President of the Russian Imperial Academy of Arts while Grand Duke Vladimir Alexandrovich was Academy President. He later served as Imperial Minister of Education in the Witte Government.
Document 13: Race to Berlin: The western Allies' decision to leave eastern Germany and the city of Berlin to the Red Army -- honoring the agreement they made with the Soviet Union at Yalta -- eventually had serious repercussions as the Cold War emerged and expanded in the post-war era.
Document 14: Molotov–Ribbentrop Pact: Some critics of Stalin's policy, such as the popular writer Viktor Suvorov, claim that Stalin's primary motive for signing the Soviet–German non-aggression treaty was his calculation that such a pact could result in a conflict between the capitalist countries of Western Europe.[citation needed] This idea is supported by Albert L. Weeks.[page needed] Claims by Suvorov that Stalin planned to invade Germany in 1941 are debated by historians with, for example, David Glantz opposing such claims, while Mikhail Meltyukhov supports them.[citation needed] The authors of The Black Book of Communism consider the pact a crime against peace and a "conspiracy to conduct war of aggression."
Document 15: Nikolai Trubetzkoy: Prince Nikolai Sergeyevich Trubetzkoy (; Moscow, April 16, 1890 – Vienna, June 25, 1938) was a Russian linguist and historian whose teachings formed a nucleus of the Prague School of structural linguistics. He is widely considered to be the founder of morphophonology. He was also associated with the Russian Eurasianists.
ground_truth: Russian
sub_queries: Victims of Yalta >> author Answer: Nikolai Tolstoy
Nikolai Tolstoy >> native language Answer: Russian