Question: Winter Soldier and Soldier Girls are both what type of film?
Context: Soldier Girls is a 1981 documentary film by Nick Broomfield and Joan Churchill about several women training in the US army. Captain America: The Winter Soldier is a 2014 American superhero film based on the Marvel Comics character Captain America, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures.  It is the sequel to 2011's "" and the ninth film in the Marvel Cinematic Universe (MCU).  The film was directed by Anthony and Joe Russo, with a screenplay by Christopher Markus & Stephen McFeely, who had also written "The First Avenger".  It stars Chris Evans as Captain America, leading an ensemble cast that includes Scarlett Johansson, Sebastian Stan, Anthony Mackie, Cobie Smulders, Frank Grillo, Emily VanCamp, Hayley Atwell, Robert Redford, and Samuel L. Jackson.  In "Captain America: The Winter Soldier", Captain America, Black Widow, and Falcon join forces to uncover a conspiracy within S.H.I.E.L.D. while facing a mysterious assassin known as the Winter Soldier. The Silver Donkey is a young-adult fiction book written by Sonya Hartnett, set during World War I.  The book traces the journey of an English soldier who deserts the war and comes across two young girls in the French countryside, Marcelle and Coco.  The girls help the soldier, who suffers psychological blindness as an effect of post-traumatic stress, to plan a way to cross the English Channel back to his brother.  The girls bring him food and, in turn, he tells them moralistic tales about courage, perseverance and trying your best at all odds.  Though his stories are fiction, one is not; the story of his younger brother John who, while being extremely ill, finds a small silver donkey whilst digging in the garden.  The soldier carries the silver donkey with him everywhere for luck, hope and inspiration, which along with hope and luck, spread to Coco when the soldier gives her the donkey.  The soldier told the children stories about donkeys and how donkeys are brave and loyal to humans. Winter Soldier is a 1972 documentary film chronicling the Winter Soldier Investigation which took place in Detroit, Michigan, from January 31 to February 2, 1971.  The film documents the accounts of American soldiers who returned from the War in Vietnam, and participated in this war crimes hearing. Going Upriver: The Long War of John Kerry is a documentary film on U.S. Senator John Kerry's military service during the Vietnam War and his subsequent participation in the peace movement.  There is significant emphasis on Kerry's famous speech before a Senate committee, historical footage from the Winter Soldier Investigations, and coverage of the Dewey Canyon III anti-war demonstrations in Washington, D.C. The majority of the film is composed of archival footage, with much of it in the original black-and-white format. Winter Soldier: Iraq and Afghanistan was an event at which more than 200 U.S. military veterans and active duty soldiers, as well as Iraqi and Afghan civilians, provided accounts of their experiences in Iraq and Afghanistan.  The event was inspired by the Winter Soldier Investigation of 1971.  It was organized by Iraq Veterans Against the War, and held from March 13 to March 16, 2008, timed for the fifth anniversary of the 2003 invasion of Iraq, at the National Labor College in Silver Spring, Maryland. The Winterfilm Collective (listed as Winterfilm, Inc. in the credits to the film "Winter Soldier") consisted of Fred Aronow (cinematographer), Nancy Baker (editor), Joe Bangert (member of Vietnam Veterans Against the War), Rhetta Barron (editor), Robert Fiore (cinematographer), David Gillis (cinematographer), David Grubin, Jeff Holstein (cinematographer), Barbara Jarvis (editor), Algis "Al" Kaupas (sound mixer), Barbara Kopple, Mark Lenix (another VVAW member), Michael Lesser (cinematographer), Nancy Miller (sound mixer), Lee Osborne (sound mixer), Lucy Massie Phenix (editor), Roger Phenix (sound mixer), Benay Rubenstein (editor), Rusty Sachs (VVAW member), and Michael Weill (editor). Front Lines is a young adult historical novel by the American writer Michael Grant, who is most famous for his dystopian young adult fictional series The Gone Series.  It is written from the viewpoint of three girls, Rio Richlin, Frangie Marr, and Rainy Schulterman.  The series was originally titled "Soldier Girls". Sebastian Stan (born August 13, 1982) is a Romanian-American actor, known for his role as Bucky Barnes / Winter Soldier in the Marvel Cinematic Universe.  On television, Stan portrayed Carter Baizen in "Gossip Girl", Prince Jack Benjamin in "Kings", Jefferson in "Once Upon a Time", and T.J. Hammond in "Political Animals".  His role in "Political Animals" earned him a nomination for the Critics' Choice Television Award for Best Supporting Actor in a Movie/Miniseries.  In 2015, he co-starred in Jonathan Demme's "Ricki and the Flash", Ridley Scott's "The Martian", and Bryan Buckley's "The Bronze". Captain America: The Winter Soldier (Original Motion Picture Soundtrack) is the film score for the Marvel Studios film, "" by Henry Jackman, which was released by Hollywood Records on April 1, 2014.
Answer: documentary