Question: Who was the director that directed both Jennifer Carpenter and Mattie Liptak? 

full_context: Document 1: Matthew Géczy: Matthew Géczy (born August 23, 1964 in the state of Georgia) is an American movie and television actor, voice actor and voice director based in Paris, France. He has acted in several films for television and cinema, with directors such as Brian De Palma and Thomas Vinterberg. He has been a voice actor in advertising campaigns, documentaries, video games, internet media and in the field of animation. He has provided voices for productions such as "Code Lyoko", "Casper's Scare School", "Ratatouille", and "Persepolis". He played a voice acting role in video games such as "Rayman 2", "", "XIII" and "Amy". He has also worked as the voice director for numerous animated television series including the Children's BAFTA-nominated series "Eliot Kid" (BBC, ABC Australia, Cartoon Network), "Mouk" (Disney Junior), "I.N.K. Invisible Network of Kids" (Pop, ABC Australia), Season 2 of "Casper's Scare School", and is currently in production for Season 2 of "The Mysterious Cities of Gold" and "The New Adventures of Lassie" for DreamWorks Classics.
Document 2: John Erick Dowdle: John Erick Dowdle (born December 1973) is an American film director and screenwriter, best known for horror films. He usually works with his brother Drew Dowdle as a producer and co-screenwriter.
Document 3: REC 2: REC 2 (stylized as [•REC]²) is a 2009 Spanish horror film sequel to 2007's "REC" and the second installment of the REC film series. The film was written and directed by Jaume Balagueró and Paco Plaza, both of whom returned from the previous film. The story takes place immediately after the events of the first film. The film was followed by "".
Document 4: Katie George: Katie George (born on September 7, 1988 in Fairhope, Alabama, United States) is an award-winning American cosplayer who has been cosplaying since 2004 and lives in Atlanta. George has been a special guest at conventions in the United States and abroad, including MomoCon, Pensacon and more, hosting panels and acting as a judge in costume contests. In 2012, she was featured in the television documentary "Cosplay: Crafting a Secret Identity" and represented the USA at the World Cosplay Summit in Nagoya, Japan. In 2014, she joined the cast of the reality television show "Heroes of Cosplay".
Document 5: Mattie Liptak: Mattie Liptak (born April 10, 1996) is an American actor best known for his role as George in the horror film, "", a sequel to the 2008 film, "Quarantine". He was born and raised in Walker, Louisiana to Brenda Tedder and Robert Liptak. Mattie graduated from Walker High School, in Walker, Louisiana in May 2014.
Document 6: Matthew George: Matthew George is an Australian film director, producer and screenwriter. His films include "Under the Gun", "Four Jacks" and "Let's Get Skase", which was co-written with Lachy Hulme. His first film, "Under the Gun", was written and directed by him at the age of 21, making him one of the youngest feature film directors in Australian film history.
Document 7: REC (film): REC (stylized as [•REC]) is a 2007 Spanish zombie horror film, co-written and directed by Jaume Balagueró and Paco Plaza. The film was shot in Barcelona, Spain and the title is an abbreviation of the word "record", as it appears on a video camera.
Document 8: Quarantine 2: Terminal: Quarantine 2: Terminal is a 2011 American horror film and a sequel to the 2008 film, "Quarantine". It was written and directed by John Pogue and produced by Marc Brienstock. The film stars Mercedes Mason, Josh Cooke and Mattie Liptak and revolves around a mutated rabies infection outbreak in a quarantined airport and taking place the same night and nearly same time as the events of the first film.
Document 9: 28 Weeks Later: 28 Weeks Later is a 2007 British science fiction horror film, structured as a sequel to the critically and commercially successful 2002 film "28 Days Later". "28 Weeks Later" was co-written and directed by Juan Carlos Fresnadillo, with Danny Boyle and Alex Garland, director and writer of "28 Days Later" respectively, now acting as executive producers. It was released in the United Kingdom and United States on 11 May 2007. The plot depicts the efforts of NATO military forces to salvage a safe zone in London following the events in "28 Days Later", the consequence of two young siblings thinking of no one but themselves by breaking protocol to find their infected mother, and the resulting death of all London's previously uninfected humans through the siblings' reintroduction of the highly contagious virus to the safe zone.
Document 10: Section Eight Productions: Section Eight Productions, or just Section Eight, was a production company founded in 2000 by film director Steven Soderbergh and actor and director George Clooney. It produced the critical hits "Far From Heaven", "Insomnia", "Syriana", "A Scanner Darkly" and "Michael Clayton", as well as Clooney-directed films "Confessions of a Dangerous Mind" and "Good Night, and Good Luck". In 2005, "Syriana" and "Good Night, and Good Luck" picked up eight Oscars nominations between them. With Soderbergh citing a desire to focus on directing, and Clooney forming production company Smoke House Pictures with Grant Heslov, the two decided to shut down Section Eight at the end of 2006.
Document 11: Cloverfield: Cloverfield is a 2008 American found footage monster horror film directed by Matt Reeves, produced by J. J. Abrams and Bryan Burk, and written by Drew Goddard. It is the first installment in the "Cloverfield" franchise. The film, which is presented as found footage shot with a home camcorder, follows six young New York City residents fleeing from a gigantic monster and various other smaller creatures that attack the city while they are having a farewell party. The film was well received by critics and it earned $170.8 million at the box office against a $25 million budget.
Document 12: Carver (film): Carver is the second horror film directed by Franklin Guerrero Jr., after The 8th Plague. Made in 2008, it stars Matt Carmody, Neil Kubath, and Erik Fones. It was filmed on location in and around Woodbridge, Virginia.
Document 13: Matthew Lintz: Matthew Lintz (born May 23, 2001) is an American actor known for playing the role of Matty in "Pixels". His two older sisters, Mackenzie and Madison, are also actors.
Document 14: Gaten Matarazzo: Gaten Matarazzo ( ; born September 8, 2002) is an American actor. He began his career on the Broadway stage as Benjamin in "Priscilla, Queen of the Desert", and as Gavroche in "Les Misérables". He currently stars as Dustin Henderson in the Netflix drama series "Stranger Things." He will return in Season 2.
Document 15: Quarantine (2008 film): Quarantine is a 2008 American found-footage horror film directed and co-written by John Erick Dowdle, produced by Sergio Aguero, Doug Davison, and Roy Lee, and co-written by Drew Dowdle, being a remake of the Spanish film "REC". The film stars Jennifer Carpenter, Jay Hernandez, Columbus Short, Greg Germann, Steve Harris, Dania Ramirez, Rade Šerbedžija, and Johnathon Schaech.
ground_truth: John Erick Dowdle