Question: RatPac-Dune Entertainment was co-founded by the billionaire of what nationality?
Context: Sonny Kahn is an American businessman.  He is the co-founder and chairman of Crescent Heights, a real estate development company based in Miami Beach, Florida.  Kahn, Russell W. Galbut and Bruce Menin co-founded the company in 1989.  He is a billionaire. Mad Max: Fury Road is a 2015 action film co-written, co-produced and directed by George Miller.  Miller collaborated with Brendan McCarthy and Nico Lathouris on the screenplay.  The fourth installment and a reboot of the "Mad Max" franchise, it is an Australian and American venture produced by Kennedy Miller Mitchell, RatPac-Dune Entertainment and Village Roadshow Pictures.  The film is set in a future desert wasteland where gasoline and water are scarce commodities.  It follows Max Rockatansky (Tom Hardy), who joins forces with Imperator Furiosa (Charlize Theron) to flee from cult leader Immortan Joe (Hugh Keays-Byrne) and his army in an armoured tanker truck, which leads to a lengthy road battle.  The film also features Nicholas Hoult, Rosie Huntington-Whiteley, Riley Keough, Zoë Kravitz, Abbey Lee, and Courtney Eaton. RatPac Entertainment is an American motion picture production and financing company owned by producer-director Brett Ratner and Access Entertainment.  RatPac was founded by Ratner and billionaire James Packer.  RatPac is a partner in RatPac-Dune Entertainment with Dune Entertainment. Brett Ratner (born March 28, 1969) is an American film producer, entertainment businessman, and director of motion pictures, music videos, and television.  He is known for directing the "Rush Hour" film series, "The Family Man", "Red Dragon", "", and "Tower Heist".  He was also a producer on the Fox drama series "Prison Break", the comedy "Horrible Bosses" and its 2014 sequel.  He is the co-founder of RatPac-Dune Entertainment, a prolific film production and financing company. Russell M. Artzt (born 1948) Co-founded Computer Associates International, Inc. (now CA Technologies) with Charles B. Wang.  While Russ was working at the Electronic Laboratories in the 1960s at Columbia University, he met Charles Wang.  They became friends and later both joined Standard Data.  "In the late 1970s a Swiss company, owned by billionaire Walter Haefner, had developed a computer program, Sort.  Russel Artzt and Charles Wang formed their own company and bought the company from Haefner.  {The preceding two statements appear to be incorrect, apparently from confusion with CA's 1987 acquisition of UCCEL Corp.}" Haefner still is the majority stockholder of Computer Associates owning over 25% of CA Inc. Stephen Philip Lansdown CBE (born 30 August 1952) is an English-born Guernsey billionaire.  He co-founded, with Peter Hargreaves, the British financial services firm Hargreaves Lansdown, founder of Bristol Sport and majority shareholder of Bristol Rugby, Bristol Flyers, and Bristol City Football Club. The Man from U.N.C.L.E. is a 2015 American action spy comedy film directed by Guy Ritchie and written by Ritchie and Lionel Wigram.  It is based on the 1964 MGM television series of the same name, which was created by Ian Fleming, Norman Felton and Sam Rolfe.  The film stars Henry Cavill, Armie Hammer, Alicia Vikander, Elizabeth Debicki, Jared Harris and Hugh Grant.  The film was produced by RatPac-Dune Entertainment and Davis Entertainment. Storks is a 2016 American 3D computer-animated adventure buddy comedy film produced by Warner Animation Group, RatPac-Dune Entertainment and Stoller Global Solutions.  It is directed by Nicholas Stoller and Doug Sweetland (in his feature debut), written by Stoller and stars the voices of Andy Samberg, Katie Crown, Kelsey Grammer, Jennifer Aniston, Ty Burrell, Keegan-Michael Key, Jordan Peele, and Danny Trejo. Alex Garden is the CEO of Vancouver-based game developer Relic Entertainment, which he co-founded with Luke Moloney in 1997.  In February 2005, he founded the company iVALET Systems Inc. to develop an advanced parking system.  In July 2005, he co-founded Klei Entertainment, a Vancouver-based video game development studio, with Jamie Cheng.  On November 3, 2006, Alex Garden joined Nexon to run Nexon's North American game development studio, Nexon Publishing North America.  In October, 2009, Alex Garden joined Microsoft to work in their games division, Microsoft Game Studios.  On April 23, 2014, Zynga announced that Alex Garden was hired to become President of Zynga Studios with a start date of May 5, 2014.  Since 13 April 2016 Alex Garden return to Relic Entertainment as CEO.  In 2016 Garden founded Zume Pizza. James Douglas Packer (born 8 September 1967) is an Australian businessman and investor.
Answer: Australian