Question: What category of film are Prophet's Prey, the 2015 American production, and Italy in a Day, which appeared at the Venice International film festival?
Context: The Venice Film Festival or Venice International Film Festival (Italian: "Mostra Internazionale d'Arte Cinematografica della Biennale di Venezia" , "International Exhibition of Cinematographic Art of the Venice Biennale"), founded in 1932, is the oldest film festival in the world and one of the "Big Three" film festivals alongside the Cannes Film Festival and Berlin International Film Festival. Vahid Jalilvand (Persian: وحید جلیلوند ‎‎; born 11 March 1976) is an Iranian film director, screenwriter, actor, and film editor.  His first directed film, Wednesday, May 9 (2015) (Chaharshanbeh, 19 Ordibehesht), has received massive admiration from multiple national and international film festivals.  He received Fipersci Award in Best Film Horizons and International Critic's Week from 72nd Venice International Film Festival for this film .  Jalilvand had further success with his next film No Date, No Signature (2017) (Bedoune Tarikh, Bedoune Emza).  The film earned Jalilvand and his actor, Navid Mohammadzadeh, Orizzonti Awards of 74th Venice International Film Festival for best director and best actor, respectively . Leonardo Corbucci is an award-winning film director from Italy who is now located in Los Angeles US and member of the DGA (Directors Guild of America).  He has won many prizes from the prestigious "Rising Star" at the Canadian International Film Festival to the "Silver Ace" at the Las Vegas International Film festival, "Best Romance" at the Best of Best Film Fest, "Best Experimental Film" at the Idie Gathering, "Best Drama" at the International Family Film Festival, "Best screenplay" at the Sunset Film Festival, "Honorable Mention" at the Queen World Film Festival, "Titoli Price" at the Murgia Film Festival, "Best Short film" at the Burbank Film Festival.  His films have been official selections at the Venice Film Festival, Beverly Hills Film Festival, Santa Barbara Film Festival, San Diego IndieFest, Phoenix Film Festival, Riverside Film Festival, Seattle True Independent Film Festival, Ventura Film Festival, Rome Film Festival, Riverband Film Festival and screened at that Cannes Film Festival. Italy in a Day - Un giorno da italiani is a 2014 Italian-British documentary film directed by Gabriele Salvatores.  It was part of the Out of Competition section at the 71st Venice International Film Festival. Looking for Grace is a 2015 Australian drama film directed by Sue Brooks.  It was screened in the main competition section of the 72nd Venice International Film Festival and in the inaugural Platform section at the 2015 Toronto International Film Festival.  The film was the first film to be directed by an Australian female director to screen at the Venice International Film Festival in 15 years. "Spotlight" is a 2015 American drama film directed by Tom McCarthy.  The film, written by Josh Singer and McCarthy, follows "The Boston Globe"' s "Spotlight" team and its investigation of sexual abuse in Boston.  It stars Mark Ruffalo, Michael Keaton, Rachel McAdams, John Slattery, Brian d'Arcy James and Liev Schreiber.  The film was premiered at the 72nd Venice International Film Festival on September 3, 2015, where McCarthy won the Brian Award.  It was also screened at the 2015 Toronto International Film Festival, where it was the second runner-up for the People's Choice Award.  Open Road Films released it theatrically in the United States on November 6, 2015.  The film was a commercial success, grossing $88.3 million worldwide on a budget of $20 million. Moritz de Hadeln (born 21 December 1940 in Exeter, Devon, England) is a Swiss documentary Film director and photographer, who became a Film Festival director.  He headed the Locarno International Film Festival from 1972 to 1977, the Berlin International Film Festival from 1980 to 2001 and the Venice International Film Festival in 2002 and 2003.  He was also a member of the jury at the 23rd Moscow International Film Festival. Prophet's Prey is a 2015 American documentary film directed by Amy J. Berg.  The film is an adaptation of the 2011 book "Prophet's Prey: My Seven-Year Investigation into Warren Jeffs and the Fundamentalist Church of Latter-Day Saints".  It was produced by Katherine LeBlond and Sam Brower, the author of the book, for Showtime and Imagine Entertainment.  It premiered at the 2015 Sundance Film Festival and had its television premiere on October 10, 2015.  The film's subject matter is Warren Jeffs, the president of the Fundamentalist Church of Jesus Christ of Latter-Day Saints, who is now running his religion from the confines of the Texas state prison, where he is serving out a sentence of life plus twenty years for the rape of girls aged 12 and 13.  The score is written by Nick Cave and Warren Ellis. Kim Ki-duk ( ] ; born December 20, 1960) is a South Korean filmmaker noted for his idiosyncratic art-house cinematic works.  His films have received many distinctions in the festival circuit, making him one of the most important contemporary Asian film directors.  Major festival awards include Golden Lion at 69th Venice International Film Festival for "Pietà", Silver Lion for Best Director at 61st Venice International Film Festival for "3-Iron", Silver bear for Best Director at 54th Berlin International Film Festival for "Samaria" and Un Certain Regard prize at 2011 Cannes Film Festival for Arirang.  His most widely known feature is "Spring, Summer, Fall, Winter... and Spring" (2003), included in film critic Roger Ebert's Great Movies.  Two of his films served as official submissions for Academy award for best foreign language film as South Korean entries.  He has given scripts to several of his former assistant directors including Juhn Jai-hong ("Beautiful" and "Poongsan") and Jang Hoon ("Rough Cut"). Unforgiven (許されざる者 , Yurusarezaru Mono ) is a 2013 Japanese jidaigeki western film directed by Lee Sang-il.  It is a remake of Clint Eastwood's 1992 western "Unforgiven".  The film was screened in the Special Presentation section at the 2013 Toronto International Film Festival.  The film also made its US debut as the opening film for LA EigaFest 2013.  It was also presented in 2014 in the Palm Springs International Film Festival (World Cinema Now category) and out of competition in the 70th Venice International Film Festival.
Answer: documentary