Complex sentence: He entered the film world with "Chenchu Lakshmi" of Tamilnadu Talkies in 1943 when the music director R. Chinnayya died during the making of film.
Split into simpler sentences: He entered the film world with "Chenchu Lakshmi" of Tamilnadu Talkies in 1943. The music director Chinnayya died during the making of film.