Question: Are Christopher Nolan and Sathish Kalathil both film directors?

Context articles: Christopher Nolan
The Prestige (film)
The Dark Knight Rises
Veena Vaadanam
Jalachhayam
Sathish Kalathil
Bangladesh Film Directors Association
Influence of Stanley Kubrick
Laloorinu Parayanullathu
Zeitgeist Films

Christopher Edward Nolan ( ; born 30 July 1970) is an English-American film director, producer, and screenwriter.
 He is one of the highest-grossing directors in history, and among the most successful and acclaimed filmmakers of the 21st century.
The Prestige is a 2006 British-American mystery thriller film directed by Christopher Nolan, from a screenplay adapted by Nolan and his brother Jonathan from Christopher Priest's 1995 novel of the same name.
 Its story follows Robert Angier and Alfred Borden, rival stage magicians in London at the end of the 19th century.
 Obsessed with creating the best stage illusion, they engage in competitive one-upmanship with tragic results.
 The film stars Hugh Jackman as Robert Angier, Christian Bale as Alfred Borden, and David Bowie as Nikola Tesla.
 It also stars Scarlett Johansson, Michael Caine, Piper Perabo, Andy Serkis, and Rebecca Hall.
 The film reunites Nolan with actors Bale and Caine from "Batman Begins" and returning cinematographer Wally Pfister, production designer Nathan Crowley, film score composer David Julyan, and editor Lee Smith.
The Dark Knight Rises is a 2012 superhero film directed by Christopher Nolan, who co-wrote the screenplay with his brother Jonathan Nolan, and the story with David S. Goyer.
 Featuring the DC Comics character Batman, the film is the final installment in Nolan's "Batman" film trilogy, and the sequel to "Batman Begins" (2005) and "The Dark Knight" (2008).
 Christian Bale reprises the lead role of Bruce Wayne/Batman, with a returning cast of allies: Michael Caine as Alfred Pennyworth, Gary Oldman as James Gordon, and Morgan Freeman as Lucius Fox.
 The film introduces Selina Kyle (Anne Hathaway), and Bane (Tom Hardy).
 Eight years after the events of "The Dark Knight", merciless revolutionary Bane forces an older Bruce Wayne to resume his role as Batman and save Gotham City from nuclear destruction.
Veena Vaadanam (Recital of Music) (മലയാളം: ) is an Indian documentary film in Malayalam language, directed by Sathish Kalathil.
 The film shot in digital format and it produced by Kalathil Creative Heads under the banner of Akhil Krishna Films, released in 2008, of 28.23 minutes' duration.
 The documentary is the first experimental work which shot through a mobile phone camera in India.
 Nokia N70 music edition mobile phone with 2 megapixel video resolution was fully used to capture the film.
 In the period of "Veena Vaadanam", it was the only eligible and costly camera phone to capture videos with a best visual quality.
 After post production works, the output can telecast with a comfortable visual clarity in Television or screen with a projector .
Jalachhayam (മലയാളം: ) is a 2010 Indian Malayalam-language Experimental film, produced and directed by Sathish Kalathil under the banner of 'The People's Films'.
 The story was written by Sujith Aalungal and describes the warm relationship between a village man and an artist (painter) from the city.
Sathish Kalathil (മലയാളം: ) is an Indian film and documentary Director and Producer in malayalam.
 He is also Story Writer, and Lyricist.
 His experimental works are well known and appropriately discussed in Malayalam Cinema industry and his debut movie Jalachhayam (2010) was well discussed according to its experimental approach.
 Actually, his first venture was in 2008 named Veena Vaadanam, a documentary film about Art (Painting) and that was his first experimental entry in movie.
 In 2012, he directed Laloorinu Parayanullathu, a social committed documentary film about Municipal solid waste.
Bangladesh Film Directors Association is the pan-national trade body of film directors in Bangladesh.
 The Bangladesh Film Directors Association’s General Secretary is Badiul Alam Khokon.
 Mushfiqur Rahman Gulzar is the president of Bangladesh Film Directors Association.
Stanley Kubrick is regarded by film critics and historians as one of the most influential directors of all time.
 Leading directors, including Martin Scorsese, Steven Spielberg, George Lucas, James Cameron, Woody Allen, Terry Gilliam, the Coen Brothers, Ridley Scott, Paul Thomas Anderson, Christopher Nolan, David Lynch, and George A. Romero, have cited Kubrick as a source of inspiration, and in the case of Spielberg, collaboration.
 In an interview for the "Eyes Wide Shut" DVD release, Steven Spielberg comments that "nobody could shoot a picture better in history", and that Kubrick told stories in a way "antithetical to the way we are accustomed to receiving stories".
 Writing in the introduction to a recent edition of Michel Ciment's "Kubrick", film director Martin Scorsese notes most of Kubrick's films were misunderstood and under-appreciated when first released, only to be considered masterpieces later on.
Laloorinu Parayanullathu (What Has Laloor To Say) (മലയാളം: ) is an Indian documentary film directed by Sathish Kalathil in Malayalam Language.
 The documentary narrates about the problems of Municipal Garbage dumping in Laloor, a suburban area in Thrissur Municipal Corporation.
 The film reveals the history of the waste dumping in Laloor since the period of Sakthan Thampuran who was the ruler of the Kingdom of Cochin and first violence against the Garbage dumping here.
Zeitgeist Films is an American independent film distributor based in New York City founded in 1988 by co-Presidents Nancy Gerstman and Emily Russo.
 Films distributed by Zeitgeist are strongly auteur-driven by directors such as Christopher Nolan, Guy Maddin, Atom Egoyan, Todd Haynes, Nuri Bilge Ceylan, Olivier Assayas, Abbas Kiarostami, Deepa Mehta, Jan Švankmajer and the Brothers Quay.
 The expansive Zeitgeist film library includes "Trouble the Water", "The Corporation", "Jellyfish", "Examined Life", "Into Great Silence", Ten and Irma Vep.
 In June 2008, the MoMA honored two decades of Zeitgeist successes with a month-long, twenty film retrospective entitled "Zeitgeist: The Films of Our Time", exhibiting the distributor's twenty most critically acclaimed, intellectually stimulating titles.