Question: What is the date of death of the composer of film Valar Pirai?
Sentence (from "K. V. Mahadevan"): , Mahadevan scored music for over six hundred feature films, spanning four decades, and has garnered two National Film Awards, the Tamil Nadu State Film Award for Best Music Director, three Nandi Awards for Best Music Director, and the Filmfare Best Music Director Award
Relevant evidence: No