Question: What is the date of death of the composer of film Vannakili?
Sentence (from "K. V. Mahadevan"): Krishnankoil Venkadachalam Mahadevan (14 March 1918 – 21 June 2001) was an Indian composer, singer-songwriter, music producer, and musician known for his works in Tamil cinema, Telugu cinema, Kannada cinema, and Malayalam cinema.
Relevant evidence: Yes