Question: Who wrote the screenplay for a movie featuring ChristIan bale?
Sentence (from "The Big Short (film)"): The Big Short is a 2015 American biographical comedy-drama film directed by Adam McKay and written by McKay and Charles Randolph, based on the 2010 book "The Big Short: Inside the Doomsday Machine" by Michael Lewis about the financial crisis of 2007–2008 which was triggered by the United States housing bubble.
Relevant evidence: Yes