Information: - The Republics of the Soviet Union or the Union Republics ("soyuznye respubliki") of the Soviet Union were ethnically based administrative units that were subordinated directly to the Government of the Soviet Union. For most of its history, the Soviet Union was a highly centralized state; the decentralization reforms during the era of "Perestroika" ("Restructuring") and "Glasnost" ("Openness") conducted by Mikhail Gorbachev led to the dissolution of the Soviet Union in 1991. - Uzbekistan, officially the Uzbek Soviet Socialist Republic (Uzbek SSR; ) and the Republic of Uzbekistan, also referred to as Soviet Uzbekistan was one of the republics of the Soviet Union existed from 1924 to 1991 and as an sovereign state from 1991 to 1992. It was governed by the Uzbek branch of the Soviet Communist Party, the only legal political party, from 1925 until 1990. From 1990 to 1991, it was the sovereign part of the Soviet Union with its own legislation. - Rustam Kasimdzhanov ( Uzbek : Rustam Qosimjonov ; Russian : ; born 5 December 1979 ) is an Uzbek chess Grandmaster , best known for winning the FIDE World Chess Championship in 2004 . He was born in Tashkent , in the former Uzbek Soviet Socialist Republic . He is an ethnic Uzbek . - The Soviet Union, officially the Union of Soviet Socialist Republics (USSR " ) was a socialist state in Eurasia that existed from 1922 to 1991. A union of multiple subnational republics, its government and economy were highly centralized. The Soviet Union was a one-party federation, governed by the Communist Party with Moscow as its capital. - A communist party is a political party that advocates the application of the social and economic principles of communism through state policy. The name originates from the 1848 tract "Manifesto of the Communist Party" by Karl Marx and Friedrich Engels. According to Leninist theory, a Communist party is the vanguard party of the working class (proletariat), whether ruling or non-ruling, but when such a party is in power in a specific country, the party is said to be the highest authority of the dictatorship of the proletariat. Vladimir Lenin's theories on the role of a Communist party were developed as the early 20th-century Russian social democracy divided into Bolshevik (meaning ""of the majority"") and Menshevik (meaning "of the minority") factions. Lenin, leader of the Bolsheviks, argued that a revolutionary party should be a small vanguard party with a centralized political command and a strict cadre policy; the Menshevik faction, however, argued that the party should be a broad-based mass movement. The Bolshevik party, which eventually became the Communist Party of the Soviet Union, took power in Russia after the October Revolution in 1917. With the creation of the Communist International, the Leninist concept of party building was copied by emerging Communist parties worldwide. After reading the paragraphs above, we are interested in knowing the entity with which 'rustam kasimdzhanov' exhibits the relationship of 'country of citizenship'. Find the answer from the choices below. Choices: - russia - soviet union - uzbek soviet socialist republic - uzbekistan
A:
uzbekistan