Question: Which political party did the son of Lev Sedov become the leader of?

full_context: Document 1: Sergei Sobolev: Sergei Lvovich Sobolev (Russian: Серге́й Льво́вич Со́болев ; 6 October 1908 – 3 January 1989) was a Soviet mathematician working in mathematical analysis and partial differential equations. He was born in St. Petersburg, and died in Moscow.
Document 2: Nikolay Kuibyshev: The son of an Imperial Russian Army officer, Kuibyshev joined the army and fought in World War I. Kuibyshev joined the Red Army in 1918 and became commander of the 3rd and 9th Rifle Divisions on the Southern Front of the Russian Civil War. During the 1920s, Kuibyshev commanded a corps, courses for Red Army commanders, the group of Soviet advisors in China, and the Main Directorate of the Red Army, and the Siberian Military District. He became secretary for Rabkrin, the Workers' and Peasants' Inspectorate, and a member of the Party Control Commission during the 1930s. Kuibyshev became commander of the Transcaucasian Military District in 1937. During the Great Purge, he was arrested in February 1938 and executed in August. Kuibyshev was posthumously pardoned in 1956.
Document 3: Joseph Stalin: Joseph Vissarionovich Stalin (18 December 1878 – 5 March 1953) was a Georgian-born Soviet revolutionary and political leader. Governing the Soviet Union as its dictator from the mid-1920s until his death in 1953, he served as General Secretary of the Central Committee of the Communist Party of the Soviet Union from 1922 to 1952 and as Premier of the Soviet Union from 1941 to 1953. Ideologically a Marxist and a Leninist, Stalin helped to formalise these ideas as Marxism–Leninism while his own policies became known as Stalinism.
Document 4: Leon Trotsky: Leon Trotsky ( ;; also transliterated "Lyev", "Trotski", "Trotskij", "Trockij" and "Trotzky". born Lev Davidovich Bronstein; 7 November 1879 – 21 August 1940) was a Marxist revolutionary, theorist, and Soviet politician. Initially supporting the Menshevik Internationalists faction within the Russian Social Democratic Labour Party, he joined the Bolsheviks ("majority") just before the 1917 October Revolution, immediately becoming a leader within the Communist Party. He would go on to become one of the seven members of the first Politburo, founded in 1917 to manage the Bolshevik Revolution. During the early days of the Russian Soviet Federative Socialist Republic (RSFSR) and the Soviet Union, he served first as People's Commissar for Foreign Affairs and later as the founder and commander of the Red Army, with the title of People's Commissar of Military and Naval Affairs. He became a major figure in the Bolshevik victory in the Russian Civil War (1918–1923).
Document 5: Fourth International: The Fourth International (FI) is the Communist international organisation consisting of followers of Leon Trotsky, or Trotskyists, with the declared goal of helping the working class bring about socialism and work toward international communism. The Fourth International was established in France in 1938: Trotsky and his supporters, having been expelled from the Soviet Union, considered the Comintern or Third International to have become "lost to" Stalinism and incapable of leading the international working class to political power. Thus, Trotskyists founded their own, competing "Fourth International".
Document 6: Ren Fuchen: Ren Fuchen (; April 1884 – November 1918) was a Chinese member of the Bolshevik party and a commander of a Chinese regiment of the Soviet Red Army during the Russian Civil War. He joined the Bolsheviks in 1908. He was killed in action during a battle against the White Army forces of Alexander Kolchak. He was known as "China's first Bolshevik". In the aftermath of the Russian Revolution, he raised a regiment of 1,500 Chinese expatriates for the Soviet cause. He was killed in November 1918. The Soviet Union awarded him a Red Flag medal in November 1989, and a statue of him was erected in Tieling, his hometown, in 1993.
Document 7: Fyodor Sergeyev: Fyodor Andreyevich Sergeyev (Russian: Фёдор Андре́евич Серге́ев , Ukrainian: Федір Андрійович Сергєєв ; March 19, 1883 – July 24, 1921), better known as Comrade Artyom (това́рищ Артём ), was a Russian revolutionary, Soviet politician, agitator, and journalist. He was a close friend of Sergei Kirov and Joseph Stalin. Sergeyev was an ideologist of the Donetsk-Krivoy Rog Soviet Republic.
Document 8: State of Revolution: State of Revolution is a play by Robert Bolt, written in 1977. It deals with the Russian Revolution of 1917 and Civil War, the rise to power of Vladimir Lenin, and the struggles of his chief lieutenants – namely Joseph Stalin and Leon Trotsky – to gain power under Lenin in the chaos of the Revolution.
Document 9: Lev Sedov: Lev Lvovich Sedov (Russian: Лев Львович Седов , also known as Leon Sedov; 24 February 1906 – 16 February 1938) was the son of the Russian Communist leader Leon Trotsky and his second wife Natalia Sedova. He was born when his father was in prison facing life imprisonment for having participated in the Revolution of 1905.
Document 10: Military history of the Soviet Union: The military history of the Soviet Union began in the days following the 1917 October Revolution that brought the Bolsheviks to power. In 1918 the new government formed the Red Army, which then defeated its various internal enemies in the Russian Civil War of 1917–22. The years 1918–21 saw defeats for the Red Army in the Polish–Soviet War (1919–21) and in independence wars for Estonia (1918–20), Latvia (1918–20) and Lithuania (1918–19). The Red Army invaded Finland (November 1939); fought the Battles of Khalkhin Gol of May-September 1939 (together with its ally Mongolia) against Japan and its client state Manchukuo; it was deployed when the Soviet Union, in agreement with Nazi Germany, took part in the invasion of Poland in September 1939, and occupied the Baltic States (June 1940), Bessarabia (June–July 1940) and Northern Bukovina (June–July 1940) (from Romania). In World War II the Red Army became a major military force in the defeat of Nazi Germany and conquered Manchuria. After the war, it occupied East Germany and many nations in central and eastern Europe, which became satellite states in the Soviet bloc.
Document 11: Transitional Program: The Transitional Program, the full name of which is "The Death Agony of Capitalism and the Tasks of the Fourth International", is a political platform adopted by the 1938 founding congress of the Fourth International, the international Leninist organization founded by Leon Trotsky. It is an example of a transitional programme.
Document 12: Lev Kamenev: Lev Borisovich Kamenev (6 July 1886 – 25 August 1936), born Lev Borisovich Rozenfeld, was a Bolshevik revolutionary and a prominent Soviet politician. He was one of the seven members of the first Politburo, founded in 1917 to manage the Bolshevik Revolution: Lenin, Zinoviev, Kamenev, Trotsky, Stalin, Sokolnikov and Bubnov.
Document 13: Soviet Revolutionary Communists (Bolsheviks): Soviet Revolutionary Communists (Bolsheviks) was an early anti-revisionist movement claimed to be an underground political outfit in the Soviet Union which criticized the leadership of Nikita Khrushchev as revisionist. It upheld the legacy of Joseph Stalin and accused the post-Stalin Soviet leadership of deviating from the socialist path. It represented the line taken by the People's Republic of China and People's Republic of Albania after the Sino-Soviet Split. Little is known about the group.
Document 14: Grigory Levin: Grigory Mikhailovich Levin (Russian: Григорий Михайлович Левин ; 10 January 1902 – 26 January 1983) was a Soviet Army colonel and a Hero of the Soviet Union. Levin served as a Red Army officer in the late 1920s and fought in the Sino-Soviet conflict of 1929. He was demobilized in 1932 and worked as a statistician. Levin was called up again after the German invasion of the Soviet Union. He served with the 385th Rifle Division and the 354th Rifle Division, in which he led a regiment. He was seriously wounded in January 1944 and upon recovery became a regimental commander in the 37th Guards Rifle Division. Levin was awarded the title Hero of the Soviet Union for his leadership of the regiment in the Battle of Berlin. Levin retired from the army in 1954 and became chairman of the Altai Krai DOSAAF.
Document 15: History of the Russian Revolution: The History of the Russian Revolution by Leon Trotsky is a 3 volume book on the Russian Revolution of 1917, first published in 1930, translated into English by Max Eastman in 1932. The three parts are: The Overthrow of Tzarism, The Attempted Counter-Revolution and The Triumph of the Soviets.
ground_truth: Communist Party