Question: Which film director is the founder of the Application Movie Pitch Pro, Derek Estlin Purvis or Andrzej Munk?

full_context: Document 1: Derek Westerman: Derek Westerman is an American screenwriter, film director, and film producer born and raised in Toledo, Ohio. His debut work was the independent web comedy series Bad Dads, a series of five, three-minute shorts featuring Michael Cera and Will Hines, which premiered on the website CollegeHumor during its 2011 Spring Season of original web shows. "Bad Dads" premiered at the Dallas International Film Festival, Palm Springs International Festival of Short Films, L.A. Comedy Shorts Film Festival, and was featured at the 2011 Just for Laughs comedy festival in Chicago, Illinois and Montreal, Quebec.
Document 2: Man on the Tracks: Man on the Tracks (Polish: "Człowiek na torze" ) is a 1956 film by Andrzej Munk.
Document 3: Witold Lesiewicz: Witold Lesiewicz (9 September, 1922 – 23 March, 2012) was a Polish film director and screenwriter. He directed 24 films between 1949 and 1979. He completed the work on the 1963 film "Passenger" after the death of director Andrzej Munk.
Document 4: Dede Gardner: Dorcas Wright "Dede" Gardner is an American film producer and the president of Plan B Entertainment, a production company founded by Brad Pitt.
Document 5: D. J. Caruso: Daniel John "D. J." Caruso, Jr. (born January 17, 1965) is an American film director, screenwriter, and producer. His work encompasses a variety of genres, including thriller ("Disturbia, Taking Lives"), dramas ("Standing Up"), horror ("The Disappointments Room"), and action ("I Am Number Four, "). He has also directed numerous episodes of television series such as "The Shield", "Over There", "Smallville", and "Dark Angel". The majority of his films fall into the thriller and action film genres.
Document 6: Derek Estlin Purvis: Derek Estlin Purvis (born November 27, 1972) is an American film director, producer, executive producer, screenwriter, and entrepreneur. He has financed, produced or directed 13 films of various genres. He is a founder and creator of the Application Movie Pitch Pro.
Document 7: Jim Burke (film producer): Burke, who is a graduate of the University of Minnesota, was a founding member of Rysher Entertainment. He was the President of Ad Hominem Enterprises, a production company he shared with Alexander Payne and Jim Taylor. The company had a first look deal with Fox Searchlight Pictures. Burke produced the 2011 film The Descendants, Cedar Rapids, and served as an Executive Producer on Tamara Jenkins' The Savages in 2007.
Document 8: Airtight (film): Airtight is a 2014 American drama thriller film written, produced and directed by Derek Estlin Purvis. A psychological thriller set in a NY mansion and an homage to Alfred Hitchcock, "Airtight" is based on the true events that inspired a play in the 1920s, an adaptation by Hitchcock in the 1940s and this feature film from 2013.
Document 9: Bad Luck (1960 film): Bad Luck (Polish: Zezowate szczęście ) is a 1960 Polish comedy film directed by Andrzej Munk. It was entered into the 1960 Cannes Film Festival.
Document 10: Andrzej Żuławski: Andrzej Żuławski (] ; 22 November 1940 – 17 February 2016) was a Polish film director and writer. He was born in Lwów, Poland (now Ukraine). Żuławski often went against mainstream commercialism in his films, and enjoyed success mostly with European art-house audiences.
Document 11: Man of Marble: Man of Marble (Polish: "Człowiek z marmuru" ) is a 1976 Polish film directed by Andrzej Wajda. It chronicles the fall from grace of a fictional heroic Polish bricklayer, Mateusz Birkut (played by Jerzy Radziwiłowicz), who became the Stakhanovite symbol of an over-achieving worker, in Nowa Huta, a new (real life) socialist city near Kraków. Agnieszka, played by Krystyna Janda in her first role, is a young filmmaker who is making her diploma film (a student graduation requirement) on Birkut, whose whereabouts seems to have been lost two decades later. The title refers to the propagandist marble statues made in Birkut's image. It is somewhat of a surprise that Wajda would have been able to make such a film, "sub silentio" attacking the socialist realism of Nowa Huta, revealing the use of propaganda and political corruption during the period of Stalinism. The film director presaged the loosening grip of the Soviets that came with the Solidarity Movement, though it has been acknowledged by Polish film historians that due to censorship the script languished in development hell since 1962. The film extensively uses original documentation footage from the construction of Nowa Huta and other subjects of Poland's early communist era, as well as the propagandist/inspirational music of Stalinist Poland.
Document 12: Andrzej Munk: Andrzej Munk (16 October 1921 – 20 September 1961) was a Polish film director, screen writer and documentalist. He was one of the most influential artists of the post-Stalinist period in the People's Republic of Poland. His feature films "Man on the Tracks" ("Człowiek na torze", 1956), "Eroica" ("Heroism", 1958), "Bad Luck" ("Zezowate szczęście", 1960), and "Passenger" ("Pasażerka" 1963), are considered classics of the Polish Film School developed in mid-1950s. He died as a result of a car crash in Kompina in a head-on collision with a truck.
Document 13: Passenger (1963 film): Passenger (Polish: "Pasażerka" ) is an unfinished 1963 Polish film directed by Andrzej Munk, which Witold Lesiewicz assembled for release.
Document 14: Steven Spielberg: Steven Allan Spielberg, {'1': ", '2': ", '3': 'KBE', '4': "} , {'1': ", '2': ", '3': 'OMRI', '4': "} (born December 18, 1946) is an American director, producer, and screenwriter. He is considered one of the founding pioneers of the New Hollywood era, as well as being viewed as one of the most popular directors and producers in film history. He is also one of the co-founders of DreamWorks Studios.
Document 15: Derik Murray: Derik Murray is the founder of Network Entertainment. He began his career as an advertising photographer and television commercial director before switching his attention to television, film and publishing projects. His credits include producing the Academy Award shortlisted "Facing Ali", a feature documentary made with Lionsgate Entertainment, and "I Am Bruce Lee", which had its US television premiere on Spike TV where it garnered the highest ratings for a documentary in the network’s history. Derik also produced "I Am Steve McQueen", produced and co-directed "I Am Evel Knievel", "I Am Chris Farley" (which surpassed "I Am Bruce Lee" ratings for Spike TV), "Johnny Cash - American Rebel" for CMT, and "The Cowboy" for Discovery. Derik recently produced and directed the feature documentary "I Am JFK Jr." and is executive producing and co-directing the seven-part series "Facing" for National Geographic. In 2017 he produced the feature film "I Am Heath Ledger".
ground_truth: Derek Estlin Purvis