Question: Louis Hofmann is a German actor appeared in a 2015 Danish-German historical drama war film that was directed by who?
Context: William Kong sometimes credited as Bill Kong () (born 1953) is a film producer known for his active role in the Hong Kong film industry and International co-production.  He is most famous for co-producing the wuxia film "Crouching Tiger, Hidden Dragon" (2000), which earned him an Academy Award nomination for Best Picture as well as a BAFTA Award for Best Film.  He co-produced the historical drama war film "The Flowers of War".  Among his other films are "Rise of the Legend" (2014) and "Monster Hunt" (2015), which was at the time of its release the largest grossing film in Chinese history. War film is a film genre concerned with warfare, typically about naval, air, or land battles, with combat scenes central to the drama.  It has been strongly associated with the 20th century.  The fateful nature of battle scenes means that war films often end with them.  Themes explored include combat, survival and escape, sacrifice, the futility and inhumanity of battle, the effects of war on society, and the moral and human issues raised by war.  War films are often categorized by their milieu, such as the Korean War; the most popular subject is the Second World War.  The stories told may be fiction, historical drama, or biographical.  Critics have noted similarities between the Western and the war film. Louis Hofmann (born 3 June 1997) is a German actor who first gained attention as the lead in the 2011 German film "Tom Sawyer" and won the Bodil Award for Best Supporting Actor for his role as a teenage German POW in the 2015 Danish film "Land of Mine". Sign of the Pagan is a 1954 American CinemaScope Technicolor historical drama war film directed by Douglas Sirk and starring Jeff Chandler, Jack Palance, Ludmilla Tcherina and Rita Gam. The Flowers of War () is a 2011 Hong Kong/Chinese historical drama war film directed by Zhang Yimou, starring Christian Bale, Ni Ni, Zhang Xinyi, Tong Dawei, Atsuro Watabe, Shigeo Kobayashi and Cao Kefan.  The film is based on a novella by Geling Yan, "13 Flowers of Nanjing", inspired by the diary of Minnie Vautrin.  The story is set in Nanking, China, during the 1937 Nanking Massacre in the Second Sino-Japanese War.  A group of escapees, finding sanctuary in a church compound, try to survive the plight and persecution brought on by the violent invasion of the city. Elephant Fury (German: Gesprengte Gitter) is a 1953 West German drama war film directed by and starring Harry Piel.  It also features Herbert A.E. Bohme, Hans Zesch-Ballot and Dorothea Wieck.  The film had a troubled production history.  Originally made between 1940 and 1943 under the title of Panic, it faced censorship problems.  Following the end of the Second World War Piel recovered the negative which had fallen into the hands of the occupying Soviet forces.  He re-shot some scenes and the film was eventually released more than a decade after it had first begun shooting. Land of Mine (Danish: Under sandet , 'Under the Sand' ) is a 2015 Danish-German historical drama war film directed by Martin Zandvliet.  It was shown in the Platform section of the 2015 Toronto International Film Festival.  It was selected and nominated for the Best Foreign Language Film category at the 89th Academy Awards. The Siege of Jadotville is a 2016 historical drama war film directed by Richie Smyth and written by Kevin Brodbin.  The film is based on Declan Power's book, "The Siege at Jadotville: The Irish Army's Forgotten Battle" (2005), about an Irish army unit's role in the UN peacekeeping mission in the Congo in September 1961. Gallipoli is a 1981 Australian drama war film directed by Peter Weir and produced by Patricia Lovell and Robert Stigwood, starring Mel Gibson and Mark Lee, about several rural Western Australian young men who enlist in the Australian Army during the First World War.  They are sent to the peninsula of Gallipoli in the Ottoman Empire (in modern-day Turkey), where they take part in the Gallipoli Campaign.  During the course of the movie, the young men slowly lose their innocence about the purpose of war.  The climax of the movie occurs on the Anzac battlefield at Gallipoli and depicts the futile attack at the Battle of the Nek on 7 August 1915.  It does, however, modify events for dramatic purposes and contains a number of significant historical inaccuracies. Macbeth is a 1948 American historical drama war film adaptation by Orson Welles of William Shakespeare's tragedy "Macbeth", with Welles in the lead role.  Jeanette Nolan co-stars as Lady Macbeth.
Answer: Martin Zandvliet