Question: Who was the president of the country where an oblast was broken up in 1943 in 1971?

full_context: Document 1: East Prussia: After the expulsion of the German population ethnic Russians, Belarusians, and Ukrainians were settled in the northern part. In the Soviet part of the region, a policy of eliminating all remnants of German history was pursued. All German place names were replaced by new Russian names. The exclave was a military zone, which was closed to foreigners; Soviet citizens could only enter with special permission. In 1967 the remnants of Königsberg Castle were demolished on the orders of Leonid Brezhnev to make way for a new "House of the Soviets".
Document 2: Kars Oblast: Kars Oblast (, "Karsskaya Oblast") was one of the oblasts of the Caucasus Viceroyalty of the Russian Empire between 1878 and 1917. Its capital was the city of Kars, presently in the Republic of Turkey. The governorate bordered with the Ottoman Empire, Batum Oblast, Tiflis Governorate, Erivan Governorate, and from 1883 to 1903 the Kutais Governorate. It covered all of Turkey's present provinces of Kars and Ardahan and the northeastern part of Erzurum Province as well as a small part of Armenia.
Document 3: Dissolution of the Soviet Union: In February 20, 1988, after a week of growing demonstrations in Stepanakert, capital of the Nagorno-Karabakh Autonomous Oblast (the Armenian majority area within Azerbaijan Soviet Socialist Republic), the Regional Soviet voted to secede and join with the Soviet Socialist Republic of Armenia. This local vote in a small, remote part of the Soviet Union made headlines around the world; it was an unprecedented defiance of republic and national authorities. On February 22, 1988, in what became known as the "Askeran clash", two Azerbaijanis were killed by Karabakh police. These deaths, announced on state radio, led to the Sumgait Pogrom. Between February 26 and March 1, the city of Sumgait (Azerbaijan) saw violent anti-Armenian rioting during which 32 people were killed. The authorities totally lost control and occupied the city with paratroopers and tanks; nearly all of the 14,000 Armenian residents of Sumgait fled.
Document 4: Viktoria Brezhneva: Viktoria Petrovna Brezhneva (; 11 December 1908 – 5 July 1995) was the wife of Soviet politician and longtime General Secretary Leonid Brezhnev. She was the mother of Yuri Brezhnev and Galina Brezhneva.
Document 5: List of leaders of the Soviet Union: Leonid Brezhnev (1906 -- 1982) 14 October 1964 ↓ 10 November 1982 † 23rd -- 26th Congress Served as First Secretary of the Central Committee of the Communist Party, was later renamed General Secretary, and was co-equal with premier Alexei Kosygin until the 1970s. To consolidate his power he later assumed the title of Chairman of the Presidium.
Document 6: Russian Soviet Federative Socialist Republic: In 1943, Karachay Autonomous Oblast was dissolved by Joseph Stalin, when the Karachays were exiled to Central Asia for their alleged collaboration with the Germans and territory was incorporated into the Georgian SSR.
Document 7: Russian Soviet Federative Socialist Republic: On January 9, 1957, Karachay Autonomous Oblast and Chechen-Ingush Autonomous Soviet Socialist Republic were restored by Khrushchev and they were transferred from the Georgian SSR back to the Russian SFSR.
Document 8: Armenia: The TSFSR existed from 1922 to 1936, when it was divided up into three separate entities (Armenian SSR, Azerbaijan SSR, and Georgian SSR). Armenians enjoyed a period of relative stability under Soviet rule. They received medicine, food, and other provisions from Moscow, and communist rule proved to be a soothing balm in contrast to the turbulent final years of the Ottoman Empire. The situation was difficult for the church, which struggled under Soviet rule. After the death of Vladimir Lenin, Joseph Stalin took the reins of power and began an era of renewed fear and terror for Armenians.
Document 9: Germans: After World War II, eastern European countries such as the Soviet Union, Poland, Czechoslovakia, Hungary, Romania and Yugoslavia expelled the Germans from their territories. Many of those had inhabited these lands for centuries, developing a unique culture. Germans were also forced to leave the former eastern territories of Germany, which were annexed by Poland (Silesia, Pomerania, parts of Brandenburg and southern part of East Prussia) and the Soviet Union (northern part of East Prussia). Between 12 and 16,5 million ethnic Germans and German citizens were expelled westwards to allied-occupied Germany.
Document 10: Russian Soviet Federative Socialist Republic: Many regions in Russia were affected by the Soviet famine of 1932–1933: Volga; Central Black Soil Region; North Caucasus; the Urals; the Crimea; part of Western Siberia; and the Kazak ASSR. With the adoption of the 1936 Soviet Constitution on December 5, 1936, the size of the RSFSR was significantly reduced. The Kazakh ASSR and Kirghiz ASSR were transformed into the Kazakh and Kirghiz Soviet Socialist Republics. The Karakalpak Autonomous Socialist Soviet Republic was transferred to the Uzbek SSR.
Document 11: East Prussia: Following Nazi Germany's defeat in World War II in 1945, East Prussia was partitioned between Poland and the Soviet Union according to the Potsdam Conference. Southern East Prussia was placed under Polish administration, while northern East Prussia was divided between the Soviet republics of Russia (the Kaliningrad Oblast) and Lithuania (the constituent counties of the Klaipėda Region). The city of Königsberg was renamed Kaliningrad in 1946. The German population of the province largely evacuated during the war, but several hundreds of thousands died during the years 1944–46 and the remainder were subsequently expelled.
Document 12: Karachay Autonomous Oblast: Karachay Autonomous Oblast was an autonomous oblast in the Soviet Union created on 26 April 1926. It was formed by the split of the Karachay-Cherkess Autonomous Oblast in 1926, creating Karachay and Cherkess Autonomous Oblast. Karachay Autonomous Oblast was dissolved during World War II, when the Karachay people were exiled to Central Asia for their alleged collaboration with the Germans. During this time, part of the territory was incorporated into the Georgian SSR. In 1957 it and the Cherkess Autonomous Oblast merged to reinstate the Karachay-Cherkess Autonomous Oblast.
Document 13: List of leaders of the Soviet Union: Under the 1977 Constitution of the Union of Soviet Socialist Republics (USSR), the Chairman of the Council of Ministers was the head of government and the Chairman of the Presidium of the Supreme Soviet was the head of state. The office of the Chairman of the Council of Ministers was comparable to a prime minister in the First World, whereas the office of the Chairman of the Presidium was comparable to a president in the First World. In the Soviet Union's seventy - year history there was no official leader of the Soviet Union office, but during most of that era there was a de facto top leader who usually led the country through the office of the Premier or the office of the General Secretary of the Communist Party of the Soviet Union (CPSU). In the ideology of Vladimir Lenin the head of the Soviet state was a collegiate body of the vanguard party (see What Is to Be Done?).
Document 14: Russian Soviet Federative Socialist Republic: In 1964, Nikita Khrushchev was removed from his position of power and replaced with Leonid Brezhnev. Under his rule, the Russian SFSR and the rest of the Soviet Union went through an era of stagnation. Even after he died in 1982, the era didn’t end until Mikhail Gorbachev took power and introduced liberal reforms in Soviet society.
Document 15: 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.
ground_truth: Leonid Brezhnev
sub_queries: Which oblast was broken up in 1943? Answer: Karachay Autonomous Oblast
Karachay Autonomous Oblast >> country Answer: Soviet Union
who was the president of Soviet Union in 1971 Answer: Leonid Brezhnev