Question: What is the date of birth of the director of film Sinahawa Atharin?
Sentence (from "Sinahawa Atharin"): Sinahawa Atharin (A Smile Through Sorrow)  is a 2015 Sri Lankan Sinhala drama philosophical film directed by Sanath Gunathilake and produced by Sunil T. Frenando for Sunil T Films.
Relevant evidence: Yes