Question: Christian Bale starred in a film based on a play by what playwright? 
Sentence (from "A Midsummer Night's Dream (1999 film)"): The ensemble cast features Kevin Kline as Bottom, Michelle Pfeiffer and Rupert Everett as Titania and Oberon, Stanley Tucci as Puck, and Calista Flockhart, Anna Friel, Christian Bale, and Dominic West as the four lovers.
Relevant evidence: No