Question: Who were the co-writers of a 2017 action-adventure film that was directed by Bong Joon-ho?
Sentence (from "Bong Joon-ho"): His latest film is "Okja" (2017), a South Korean-American film, which competed for the "Palme d'Or" in the main competition section at the 2017 Cannes Film Festival.
Relevant evidence: No