Question: Gemma Christina Arterton, is an English actress, she plays the lead role in which 2016 British war comedy-drama film directed by Lone Scherfig and written by Gaby Chiappe, based on the 2009 novel "Their Finest Hour and a Half" by Lissa Evans?
Sentence (from "Their Finest"): The film tells the story of a British Ministry of Information film team making a morale-boosting film about the Dunkirk evacuation during the Battle of Britain and the London Blitz.
Relevant evidence: No