Question: At what age did the actor who played the "antagonist" in the film Thuppakki first start learning martial arts?
Sentence (from "Ashton Chen"): He is also credited as Xiaolung, Tommy Sik, Shi Xiao-Lung, Shi Xiao-Long, Shi Shao-Long, Shieh Shiao-Long, Xi Xiao-Long, Sik Siu-Loong, and S. L. Sik on some of his films.
Relevant evidence: No