Question: When was the director of film Chaduvukunna Ammayilu born?
Sentence (from "Adurthi Subba Rao"): In 1968, Rao experimented with courtroom drama and detective fiction in his work Sudigundalu, the film received special mention at the Tashkent and Moscow Film Festivals for its inherent "film with a key" narrative.
Relevant evidence: No