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 "Gemma Arterton"): She plays the lead role in "Their Finest" (2017).
Relevant evidence: Yes