Question: What movie starring Jung Jin-young was adapted from the 2000 state play "Yi?"
Sentence (from "Jung Jin-young"): But Jung is best known for his frequent collaborations with director Lee Joon-ik, namely "Once Upon a Time in a Battlefield" and its sequel "Battlefield Heroes", "The Happy Life", "Sunny", and particularly for his role as King Yeonsan in the hugely successful "King and the Clown".
Relevant evidence: Yes