After years of internment , like PERSON@1 and PERSON@2 , PERSON@3 became a pupil of PERSON@4 , and it was PERSON@5 who became the mentor of the MISC@1 and persuaded PERSON@3 , who had been a violinist , to become a viola player .

When they were freed they became pupils of PERSON@4 who persuaded PERSON@3 to play the viola instead of the violin .
