Question: What is a 2010 3D documentary film by Werner Herzog about the Chauvet Cave in southern France, War/Dance or Cave of Forgotten Dreams?
Context: Horse slaughter is the practice of slaughtering horses to produce meat for consumption.  Humans have long consumed horse meat; the oldest known cave art, the 30,000-year-old paintings in France's Chauvet Cave, depict horses with other wild animals hunted by humans.  Equine domestication is believed to have begun to raise horses for human consumption.  The practice has become controversial in some parts of the world due to several concerns: whether horses are (or can be) managed humanely in industrial slaughter; whether horses not raised for consumption yield safe meat, and whether it is appropriate to consume a companion animal. War/Dance is a 2007 American documentary film written and directed by Sean Fine and Andrea Nix Fine and produced by Shine Global's Susan MacLaury, a professor at Kean University, and Albie Hecht.  It was nominated for the 2008 Academy Award for Best Documentary Feature and received the Emmy Award for Best Documentary and Best Cinematography in 2010. The Cueva de El Castillo, or the "Cave of the Castle", is an archaeological site within the complex of the Caves of Monte Castillo, and is located in Puente Viesgo, in the province of Cantabria, Spain.  It contains the oldest known cave art in Europe.  Some researchers argue this might even be the oldest known example of artwork in the world and likely to be a product of "Homo neanderthalensis".  Hand stencils, claviforms (club shapes) and disks made by blowing paint onto the wall in El Castillo cave were found that date back at least 40,800 years, making them older than those of the Chauvet Cave in central France, which are dated to around 39,000 years BP. Portrait Werner Herzog (German: Werner Herzog - Filmemacher ) is an autobiographical short film by Werner Herzog made in 1986.  Herzog tells stories about his life and career. The Caverne du Pont-d'Arc is a replica of the Chauvet Cave in the commune of Vallon-Pont-d'Arc, in the department of Ardèche and in the Rhône-Alpes region of France.  Construction began in October 2012 and it was opened to the public in 2015. How Much Wood Would a Woodchuck Chuck (German: Beobachtungen zu einer neuen Sprache, literally "Observations of a New Language") is a 1976 documentary film by German director Werner Herzog, produced by Werner Herzog Filmproduktion.  It is a 44-minute film documenting the World Livestock Auctioneer Championship held in New Holland, Pennsylvania.  Herzog has said that he believes auctioneering to be "the last poetry possible, the poetry of capitalism."  Herzog describes the auctioneering as an "extreme language ... frightening but quite beautiful at the same time." La Soufrière – Warten auf eine unausweichliche Katastrophe ("La Soufrière – Waiting for an Inevitable Disaster") is a 1977 West German documentary film in which German director Werner Herzog visits an island on which a volcano is predicted to erupt.  The pretext of this film was provided when Herzog "heard about the impending volcanic eruption, that the island of Guadeloupe had been evacuated and that one peasant had refused to leave, [he] knew [he] wanted to go talk to him and find out what kind of relationship towards death he had" (Cronin).  Herzog explores the deserted streets of the towns on the island.  The crew of three treks up to the caldera, where clouds of sulfurous steam and smoke shift drift like "harbingers of death" (Peucker), an example of the sublime Herzog seeks to conjure in his films.  Herzog converses in French with three different men he finds remaining on the island: one says he is waiting for death, and demonstrates his posture for doing so; another says he has stayed to look after the animals.  In the end, the volcano did not erupt, thus sparing the lives of those who had remained on the island, including Herzog and his crew. Cave of Forgotten Dreams is a 2010 3D documentary film by Werner Herzog about the Chauvet Cave in southern France, which contains the oldest human-painted images yet discovered.  Some of them were crafted around 32,000 years ago.  The film premiered at the 2010 Toronto International Film Festival and consists of images from inside the cave as well as of interviews with various scientists and historians.  The film also includes footage of the nearby Pont d'Arc natural bridge. Werner Herzog Eats His Shoe is a short documentary film directed by Les Blank in 1980 which depicts director Werner Herzog living up to his promise that he would eat his shoe if Errol Morris ever completed the film "Gates of Heaven".  The film includes clips from both "Gates of Heaven" and Herzog's 1970 feature "Even Dwarfs Started Small".  Comic song "Old Whisky Shoes", played by the Walt Solek Band, is the signature tune over the opening and closing credits. Lucki Stipetić (also Lucki Herzog) is a German film producer, and the younger half brother of filmmaker Werner Herzog.  Stipetić is the official head of Werner Herzog Filmproduktion, the production company which has produced almost all of Herzog's films.
Answer: Cave of Forgotten Dreams