Question: What film starring Natalie Portman appeared at the 67th Venice International Film Festival?
Context: The 67th annual Venice International Film Festival held in Venice, Italy, took place from 1 to 11 September 2010.  American film director and screenwriter Quentin Tarantino was head of the Jury.  John Woo was awarded the Golden Lion for Lifetime Achievement prior to the start of the Festival.  The opening film was Darren Aronofsky's "Black Swan". Three Fables of Love (French: Les Quatre Vérités , Italian: Le quattro verità , Spanish: Las cuatro verdades ) is a 1962 internationally co-produced comedy film starring Anna Karina.  It was shown as part of a retrospective on Italian comedy at the 67th Venice International Film Festival. Majority (Turkish: "Çoğunluk" ) is a 2010 Turkish drama film directed by Seren Yüce, which tells the story of a middle class young man rebelling against his father's brutish authority while seeking a rough romance with a woman of ethnic minority.  The film, which went on nationwide general release across Turkey on  15, 2010 (2010--) , won several Golden Orange awards at the 47th International Antalya Golden Orange Film Festival and was premiered at the 67th Venice International Film Festival, where it won the award for best debut film.  Hürriyet Daily News reporter Vercihan Zilioğlu wrote that, "The director's moral tale draws on the example of today's Turkish youth and the timeless shadow of fathers over sons," and Today's Zaman reviewer Emine Yıldırım concludes that this is, "one of the rawest and truest stories from our society," and "As Yüce’s hardcore realism shows us, love sometimes does not conquer all when individuals chose to become part of the herd." Black Swan is a 2010 American psychological horror film directed by Darren Aronofsky.  The screenplay by Mark Heyman, Andres Heinz and John McLaughlin is from a story by Heinz.  It stars Natalie Portman, Vincent Cassel, Mila Kunis, Barbara Hershey and Winona Ryder.  The plot revolves around a production of Tchaikovsky's "Swan Lake" ballet by a prestigious New York City company.  The production requires a ballerina to play the innocent and fragile White Swan, for which the committed dancer Nina (Portman) is a perfect fit, as well as the dark and sensual Black Swan, which are qualities better embodied by the new arrival Lily (Kunis).  Nina is overwhelmed by a feeling of immense pressure when she finds herself competing for the part, causing her to lose her tenuous grip on reality and descend into a living nightmare. Legend of the Fist: The Return of Chen Zhen is a 2010 Hong Kong martial arts film directed and produced by Andrew Lau, and starring Donnie Yen as Chen Zhen, a role made famous by Bruce Lee in the 1972 film "Fist of Fury".  The film is a sequel to the 1994 film "Fist of Legend", which starred Jet Li as Chen Zhen.  Principal photography for "Legend of the Fist: The Return of Chen Zhen" began in November 2009 and ended in early February 2010; shooting took place in Shanghai, China.  The film was shown out of competition during the opening night of the 67th Venice International Film Festival, and 2010 Toronto International Film Festival.  The film was released in Chinese theatres on 21 September 2010 and two days later in Hong Kong on 23 September 2010. Post Mortem is a 2010 Chilean film directed by Pablo Larraín and set during the 1973 military coup that overthrew former President Salvador Allende, inaugurating the 17-year dictatorship of Augusto Pinochet.  The film competed in the 67th Venice International Film Festival, Antofagasta Film Festival, Havana Film Festival and the Guadalajara International Film Festival.  The film's main character "Mario Cornejo" is based on a real person with the same name. Gianfranco Rosi is an Italian director, cinematographer, producer and screenwriter.  His film "Sacro GRA" won Golden Lion at 70th Venice International Film Festival.  "Sacro GRA" is the first documentary film to win Golden Lion in history of the Venice film festival and the first Italian film to win in fifteen years, after Gianni Amelio's "The Way We Laughed" won the award in 1998.  His 2016 film "Fire at Sea", a documentary focused on European migrant crisis on the Sicilan island of Lampedusa, won the Golden Bear at the 66th Berlin International Film Festival.  Rosi is the only documentary filmmaker to win two top prizes at major European film festivals (Cannes, Berlin and Venice) and is currently the only filmmaker besides Michael Haneke, Jafar Panahi, Ang Lee, and Ken Loach to win two top European festival prizes in the 21st century. Mario Martone (born 20 November 1959) is an Italian film director and screenwriter.  He has directed 15 films since 1985.  His film "L'amore molesto" was entered into the 1995 Cannes Film Festival.  His 2010 film "Noi credevamo" competed for the Golden Lion at the 67th Venice International Film Festival.  He was also the stage director for Lorenzo Ferrero's opera "Charlotte Corday", which was premiered at Teatro dell'Opera di Roma on 21 February, 1989. 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"). 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 .
Answer: Black Swan