Question: What is the date of death of the director of film Ek Adhuri Kahani?
Sentence (from "Ek Adhuri Kahani"): Ek Adhuri Kahani is 1972 Hindi language movie directed by Mrinal Sen, starring Utpal Dutt, Shekhar Chatterjee, Vivek Chatterjee, Aarti Bhattacharya, Shyam and Shobha Sen.
Relevant evidence: Yes