Question: Who were the co-writers of a 2017 action-adventure film that was directed by Bong Joon-ho?
Sentence (from "Okja"): The film stars an ensemble cast headed by South Korean child actress Ahn Seo-hyun, alongside Hollywood actors Tilda Swinton, Paul Dano, Steven Yeun, Lily Collins, and Jake Gyllenhaal.
Relevant evidence: No