Question: What nationality was the film score composer who worked on a 2017 World War II film by Christopher Nolan?
Sentence (from "Dunkirk (2017 film)"): 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.
Relevant evidence: No