Question: Christian Bale starred in a film based on a play by what playwright? 
Sentence (from "The Dark Knight (film)"): In the film, Bruce Wayne/Batman (Bale), Police Lieutenant James Gordon (Oldman) and District Attorney Harvey Dent (Eckhart) form an alliance to dismantle organized crime in Gotham City, but are menaced by a criminal mastermind known as the Joker (Ledger) who seeks to undermine Batman's influence and create chaos.
Relevant evidence: No