Question: Mstislav Rostropovich, Daniil Shafran and Sviatoslav Knushevitsky were leading examples of what kind of musician among 20th century Russians?

Context paragraphs:
Daniil Shafran: Daniil Borisovich Shafran (Russian: Даниил Борисович Шафран , January 13, 1923February 7, 1997) was a Soviet Russian cellist.

Thraliana: The Thraliana was a diary kept by Hester Thrale and is part of the genre known as table talk.  Although the work began as Thrale's diary focused on her experience with her family, it slowly changed focus to emphasise various anecdotes and stories about the life of Samuel Johnson.  The work was used as a basis for Thrale's "Anecdotes of the Late Samuel Johnson", but the "Thraliana" remained unpublished until 1942.  The anecdotes contained within the work were popular with Thrale's contemporaries but seen as vulgar.  Among 20th century readers, the work was popular, and many literary critics believe that the work is a valuable contribution to the genre and for providing information about Johnson's and her own life.

Church of St. Anne, Kraków: The Church of St. Anne (Polish: "Kolegiata św.  Anny" ) located at ulica św.  Anny 11 street in the historic centre of Kraków, Poland, is one of the leading examples of Polish Baroque architecture.  The church's history dates back to 14th century.

Grand galop chromatique: Grand galop chromatique in E-flat major, S.219 is a bravura piece by Franz Liszt, composed in 1838.  This gallop was one of Liszt's favorite encores which he considered a "rouser."  The "galop chromatique" was published as a piano solo version and also as a piano duet version (S.616).  Among 20th century pianists, György Cziffra notably attained enormous audience success with this piece.

Mstislav Rostropovich: Mstislav Leopoldovich "Slava" Rostropovich (Russian: Мстисла́в Леопо́льдович Ростропо́вич , "Mstislav Leopol'dovič Rostropovič", ] ; 27 March 192727 April 2007) was a Soviet and Russian cellist and conductor.  He is considered to be one of the greatest cellists of the 20th century.  In addition to his interpretations and technique, he was well known for both inspiring and commissioning new works, which enlarged the cello repertoire more than any cellist before or since.  He inspired and premiered over 100 pieces, forming long-standing friendships and artistic partnerships with composers including Dmitri Shostakovich, Sergei Prokofiev, Henri Dutilleux, Witold Lutosławski, Olivier Messiaen, Luciano Berio, Krzysztof Penderecki, Alfred Schnittke, Norbert Moret, Andreas Makris and Benjamin Britten.

Russians in Turkmenistan: Russians in Turkmenistan are a minority ethnic group, numbering 297,913 as of 2000 census representing 4% of the population.  Most Ethnic Russians migrated to Turkmenistan during the 20th century.  A large number of settlements were founded in the north of the country.  The Russian population reached its peak just before the breakup of the Soviet Union.  Most ethnic Russians live in the capital city of Turkmenistan, Ashgabat.  Significant populations are found in other major cities.  The main religion of Russians in Turkmenistan is Russian Orthodoxy.

Sviatoslav Knushevitsky: Sviatoslav Nikolayevich Knushevitsky (also seen as Knushevitzky; 6 January 1908 [O.S. 24 December 1907] 19 February 1963) was a Soviet-Russian classical cellist.  He was particularly noted for his partnership with the violinist David Oistrakh and the pianist Lev Oborin in a renowned piano trio from 1940 until his death.  After Mstislav Rostropovich and Daniil Shafran, he is spoken of as one of the pre-eminent Russian cellists of the 20th century.

Troels Svane: Troels Svane (born 1967) is a Danish cellist.  He is a part of the Zapolski Quartet.  He studied with David Geringas at the Lübeck Academy of Music in Germany.  He graduated from the soloist class with distinction and the highest grade in all subjects.  He was taught by Anner Bylsma, Frans Helmerson, Ralph Kirshbaum, György Ligeti, Yo-Yo Ma, Siegfried Palm, Boris Pergamenschikow, Mstislav Rostropovich, Daniil Shafran, Paul Tortelier and the Amadeus Quartet.

Stefan Popov: Stefan Popov (born 3rd of April 1940) is a cellist who holds Bulgarian nationality.  He started to learn to play the cello at the age of 9 and, having won a scholarship, continued his training at the Moscow Conservatory where he studied under Sviatoslav Knushevitsky and Mstislav Rostropovich from 1961 to 1966.  He became a prize-winner in many competitions, including Geneva, Florence and Vienna.  In 1966, as a finalist he won a medal in the International Tchaikovsky Competition for Cello.  At the same time as the Tchaikovsky competition, he was also awarded a prize from the Union of Soviet Composers for his performance of Russian music.

Alameda-class ferry: Alameda was the first of three large-capacity ferries intended to transport passengers across San Francisco Bay.  Southern Pacific Transportation Company and predecessor railroads had been operating ferries between San Francisco and Oakland, California since 1862.  By the early 20th century, service had stabilized on three routes to the San Francisco Ferry Building from Oakland Pier, Alameda, and the San Antonio Creek estuary.  Each route required two ferries shuttling back and forth to meet the departure schedule, with a third ferry in reserve when one boat needed maintenance or repair.  Southern Pacific's engineering department designed "Alameda" for the heavily traveled Oakland Pier route as passenger counts rose during the period of prosperity preceding World War I.  "Alameda" used side wheels for propulsion; but, instead of being powered by a single walking beam engine, wheels were powered independently by two engines for greater maneuverability.  The twin stacks were distinctive among 20th century San Francisco Bay ferries.

Supporting paragraphs: Sviatoslav Knushevitsky Daniil Shafran
Answer: cellist