Question:  Samvel Alumyan was a Soviet-Armenian classical pianist and frequent collaborator with a violinist many considered to be among the greatest violinists of what?
Sentence (from "Manuel Quiroga (violinist)"): Guilhermina Suggia, the Portuguese cellist (and one-time companion of Pablo Casals), described his playing of Tartini's "Devil's Trill Sonata" as "marvellous and flawless".
Relevant evidence: No