Question: Which author wrote the story on which the movie in which Ko Chang-seok played the movie director was based?
Sentence (from "Ko Chang-seok"): He once earned his living by working on farms and in iron foundries, then acquired fame through his scene-stealing roles in Jang Hoon's films, notably as the movie director in "Rough Cut" (2008), and the Vietnamese gang boss in "Secret Reunion" (2010).
Relevant evidence: No