Question: What is the date of death of the director of film Valliyin Selvan?
Sentence (from "Kothamangalam Subbu"): Kothamangalam Subbu (born S. M. Subramanian, 10 November 1910 – 15 February 1974) was an Indian poet, lyricist, author, actor and film director based in Tamil Nadu.
Relevant evidence: Yes