Question: What is the date of death of the director of film Thenum Vayambum?
Sentence (from "Thenum Vayambum"): Thenum Vayambum is a 1981 Malayalam film directed by Ashok Kumar, starring Nedumudi Venu, Prem Nazir and Sumalatha in the leading roles, along with Mohanlal and Rani Padmini.
Relevant evidence: Yes