Question: Efrem Flaks was the original performer of songs composed by which other Soviet film composer?
Sentence (from "Efrem Flaks"): Efrem Borisovich Flaks (Russian: Ефре́м Бори́сович Флакс ; 15 January [O.S. 2 January] 1909 — 17 December 1982) was a Soviet singer (bass).
Relevant evidence: No