Information: - Anton Grigorevich Rubinstein was a Russian pianist, composer and conductor who became a pivotal figure in Russian culture when he founded the Saint Petersburg Conservatory. He was the elder brother of Nikolai Rubinstein who founded the Moscow Conservatory. - Mikhail Nikolayevich Tukhachevsky ( June 12, 1937) was a leading Soviet military leader and theoretician from 1918 to 1937. He commanded the Soviet Western Front in the Russo-Polish War of 192021 and served as chief of staff of the Red Army from 1925 through 1928, as assistant in the People's Commissariat of Defense after 1934 and as commander of the Volga Military District in 1937. He contributed to the modernization of Soviet armament and army force structure in the 1920s and 1930s and became instrumental in the development of aviation, mechanized, and airborne forces. As a theoretician, he was a driving force behind Soviet development of the theory of deep operations. The Soviet authorities accused him of treason and had him shot during the military purges of 193738, but rehabilitated his reputation in the 1960s. - The Czech Republic, also known by the short name Czechia, is a nation state in Central Europe bordered by Germany to the west, Austria to the south, Slovakia to the east and Poland to the northeast. The Czech Republic covers an area of with mostly temperate continental climate and oceanic climate. It is a unitary parliamentary republic, has 10.5million inhabitants and the capital and largest city is Prague, with over 1.2million residents. The Czech Republic includes the historical territories of Bohemia, Moravia, and Czech Silesia. - A pianist is an individual musician who plays the piano. Most forms of Western music can make use of the piano. Consequently, pianists have a wide variety of repertoire and styles to choose from, including traditionally classical music, Jazz, blues and all sorts of popular music, including rock music. Most pianists can, to a certain extent, play other keyboard-related instruments such as the synthesizer, harpsichord, celesta and the organ and keyboard. Perhaps the greatest pianist of all time was Franz Liszt, whose piano mastery was described by Anton Rubinstein: "In comparison with Liszt, all other pianists are children". - Gustav Mahler (7 July 1860, Kalist in Bohemia, now Czech Republic 18 May 1911, Vienna in Austria-Hungary) was an Austrian late-Romantic composer, and one of the leading conductors of his generation. As a composer he acted as a bridge between the 19th century Austro-German tradition and the modernism of the early 20th century. While in his lifetime his status as a conductor was established beyond question, his own music gained wide popularity only after periods of relative neglect which included a ban on its performance in much of Europe during the Nazi era. After 1945 his compositions were rediscovered and championed by a new generation of listeners; Mahler then became one of the most frequently performed and recorded of all composers, a position he has sustained into the 21st century. - In law, treason is the crime that covers some of the more extreme acts against one's nation or sovereign. Historically, treason also covered the murder of specific social superiors, such as the murder of a husband by his wife or that of a master by his servant. Treason against the king was known as high treason and treason against a lesser superior was petty treason. A person who commits treason is known in law as a traitor. "Oran's Dictionary of the Law" (1983) defines treason as "...[a]...citizen's actions to help a foreign government overthrow, make war against, or seriously injure the [parent nation]." In many nations, it is also often considered treason to attempt or conspire to overthrow the government, even if no foreign country is aiding or involved by such an endeavor. - Dmitri Dmitriyevich Shostakovich ( Russian : , tr. Dmitriy Dmitrievich Shostakovich , pronounced ( dmitrj dmitrvt stkovt ) ; 25 September 1906 -- 9 August 1975 ) was a Soviet composer and pianist , and a prominent figure of 20th - century music . Shostakovich achieved fame in the Soviet Union under the patronage of Soviet chief of staff Mikhail Tukhachevsky , but later had a complex and difficult relationship with the government . Nevertheless , he received accolades and state awards and served in the Supreme Soviet of the RSFSR ( 1947 -- 1962 ) and the Supreme Soviet of the Soviet Union ( from 1962 until his death ) . A poly - stylist , Shostakovich developed a hybrid voice , combining a variety of different musical techniques into his music . Shostakovich 's music is characterized by sharp contrasts , elements of the grotesque , and ambivalent tonality ; the composer was also heavily influenced by the neo-classical style pioneered by Igor Stravinsky , and ( especially in his symphonies ) by the post-Romanticism associated with Gustav Mahler . Shostakovich 's orchestral works include 15 symphonies and six concerti . His chamber output includes 15 string quartets , a piano quintet , two piano trios , and two pieces for string octet . His piano works include two solo sonatas , an early set of preludes , and a later set of 24 preludes and fugues . Other works include three operas , several song cycles , ballets , and a substantial quantity of film music ; especially well known is The Second Waltz , Op. 99 , music to the film The First Echelon ( 1955 -- 1956 ) , as well as the Suites composed for The Gadfly . - Austria-Hungary, often referred to as the Austro-Hungarian Empire in English-language sources, was a constitutional union of the Austrian Empire (the Kingdoms and lands represented in the Imperial Council, or "Cisleithania") and the Kingdom of Hungary (Lands of the Crown of Saint Stephen or "Transleithania") that existed from 1867 to 1918, when it collapsed as a result of defeat in World War I. The union was a result of the Austro-Hungarian Compromise of 1867 and came into existence on 30 March 1867. Austria-Hungary consisted of two monarchies (Austria and Hungary), and one autonomous region: the Kingdom of Croatia-Slavonia under the Hungarian crown, which negotiated the CroatianHungarian Settlement ("Nagodba") in 1868. It was ruled by the House of Habsburg, and constituted the last phase in the constitutional evolution of the Habsburg Monarchy. Following the 1867 reforms, the Austrian and the Hungarian states were co-equal. Foreign affairs and the military came under joint oversight, but all other governmental faculties were divided between respective states. - Vienna is the capital and largest city of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.8million (2.6million within the metropolitan area, nearly one third of Austria's population), and its cultural, economic, and political centre. It is the 7th-largest city by population within city limits in the European Union. Until the beginning of the 20th century, it was the largest German-speaking city in the world, and before the splitting of the Austro-Hungarian Empire in World War I, the city had 2 million inhabitants. Today, it has the second largest number of German speakers after Berlin. Vienna is host to many major international organizations, including the United Nations and OPEC. The city is located in the eastern part of Austria and is close to the borders of the Czech Republic, Slovakia, and Hungary. These regions work together in a European Centrope border region. Along with nearby Bratislava, Vienna forms a metropolitan region with 3million inhabitants. In 2001, the city centre was designated a UNESCO World Heritage Site. Given the information, choose the subject and object entities that have the relation of 'educated at'.
A:
dmitri shostakovich , saint petersburg conservatory