Given the task definition and input, reply with output. In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.

Dunkirk is a 2017 war film written, co-produced, and directed by Christopher Nolan that portrays the Dunkirk evacuation of the Second World War. Its ensemble cast includes Fionn Whitehead, Tom Glynn-Carney, Jack Lowden, Harry Styles, Aneurin Barnard, James D'Arcy, Barry Keoghan, Kenneth Branagh, Cillian Murphy, Mark Rylance, and Tom Hardy. Distributed by Warner Bros. Pictures, the film is a co-production between the United Kingdom, the United States, France, and the Netherlands. Question: Which movie starring Aneurin Barnard was directed by Christopher Nolan? Answer: Dunkirk
Dunkirk is a 2017 war film written, coproduced, and directed by Christopher Nolan that portrays the Dunkirk evacuation of the Second World War.