Question: Mstislav Rostropovich, Daniil Shafran and Sviatoslav Knushevitsky were leading examples of what kind of musician among 20th century Russians?
Sentence (from "Troels Svane"): 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.
Relevant evidence: No