Question: are Gus Van Sant and Steve Buscemi both film directors ?

Context articles: Even Cowgirls Get the Blues (film)
Drugstore Cowboy
Gus Van Sant
James Chinlund
Casey Affleck
My Own Private River
Elias McConnell
Steve Buscemi
Gerry (2002 film)
Harris Savides

Even Cowgirls Get the Blues is a 1993 American romantic comedy-drama film based on Tom Robbins' 1976 novel of the same name.
 The film was directed by Gus Van Sant (credited as Gus Van Sant, Jr.) and starred an ensemble cast led by Uma Thurman, Lorraine Bracco, Angie Dickinson, Noriyuki "Pat" Morita, Keanu Reeves, John Hurt, and Rain Phoenix.
 Robbins himself was the narrator.
 The soundtrack was sung entirely by k.d. lang.
 The film was dedicated to the late River Phoenix.
Drugstore Cowboy is a 1989 American crime drama film directed by the American filmmaker Gus Van Sant.
 Written by Van Sant and Daniel Yost, and based on an autobiographical novel by James Fogle, the film stars Matt Dillon, Kelly Lynch, Heather Graham and William S. Burroughs.
 It was Van Sant's second film as director.
Gus Green Van Sant, Jr. (born July 24, 1952) is an American film director, screenwriter, painter, photographer, musician and author who has earned acclaim as both an independent and more mainstream filmmaker.
 His films typically deal with themes of marginalized subcultures, in particular homosexuality; as such, Van Sant is considered one of the most prominent auteurs of the New Queer Cinema movement.
James Chinlund (born March 17, 1971) was born and raised in New York City.
 He studied Fine Art at CalArts in Los Angeles, with a focus on sculpture and large scale installation work.
 After graduating, Chinlund returned to New York and started his career in film, first as a carpenter, before finding opportunities as a Production Designer on music videos and independent films.
 During this period he first worked with frequent collaborator Darren Aronofsky ("Requiem for a Dream", "The Fountain") in addition to other directors in the New York independent film world including: Todd Solondz ("Storytelling"), Paul Schrader ("Auto Focus") and Spike Lee ("25th Hour").
 Over the years James has been active in the worlds of commercials and fashion as well.
 Collaborators include: Inez van Lamsweerde and Vinoodh Matadin, Rupert Sanders, Spike Jonze, Fredrik Bond, Lance Acord, Gus Van Sant and Harmony Korine.
 In 2010 he won both the Art Directors Guild and the AICP awards for "Absolut World", a commercial collaboration with director Rupert Sanders.
 After a short break from features to care for his young daughter, Chinlund returned to the feature world in 2012 to work on "The Avengers" for Marvel which set a record for the highest grossing opening weekend of all time.
 In 2015 he was nominated for an Art Director’s Guild Award and the Saturn Award for his work on the Fox film "Dawn of the Planet of the Apes" directed by Matt Reeves.
 Most recently James has completed work on the next film in the Apes series "War for the Planet of the Apes".
Caleb Casey McGuire Affleck-Boldt (born August 12, 1975) is an American actor and director.
 He began his career as a child actor, appearing in the PBS television movie "Lemon Sky" (1988) and the ABC miniseries "The Kennedys of Massachusetts" (1990).
 He later appeared in three Gus Van Sant films – "To Die For" (1995), "Good Will Hunting" (1997), and "Gerry" (2002) – and in Steven Soderbergh's comedy heist trilogy "Ocean's Eleven" (2001), "Ocean's Twelve" (2004) and "Ocean's Thirteen" (2007).
 His first leading role was in Steve Buscemi's independent comedy-drama "Lonesome Jim" (2006).
My Own Private River is a re-contextualized adventure drama film of My Own Private Idaho (1991).
 Using footage shot and directed by Gus Van Sant in 1990, the new edit gives James Franco and Van Sant a shared director credit.
 The project is in tribute to Franco's favorite actor, River Phoenix.
 Franco called "Idaho" one of his favorite movies and praised River's performance as the actor’s best.
Elias Comfort McConnell (born 1985) is an American actor from Portland, Oregon.
 In 2003 he played a character of the same name in Gus Van Sant's film "Elephant".
 Three years later in 2006 he was cast in the role of Elie (segment "Le Marais") in the anthology film "Paris, Je t'aime" which had 22 different directors.
 In 2008 Elias played a small role as "Telephone Tree #8" in the Gus Van Sant directed biographical film "Milk".
 Followed closely by his 2009 role as "Young Hippy Boy" (Elias Comfort) in Jean-Claude Schlim's Luxembourgian-German drama film ""House of Boys"".
 Elias has an upcoming role in the Kevin Foong film "Casting Room" (2012) which is currently in post-production.
 Elias McConnell is now living in Brooklyn, New York.
Steven Vincent Buscemi ( ; born December 13, 1957) is an American actor and film director.
 Buscemi has starred and supported in successful Hollywood and indie films, including "Parting Glances", "New York Stories", "Mystery Train", "Reservoir Dogs", "Desperado", "Con Air", "Armageddon", "The Grey Zone", "Ghost World", "Big Fish", and "The Sopranos".
 He is also known for his appearances in many films by the Coen brothers: "Miller's Crossing", "Barton Fink", "The Hudsucker Proxy", "Fargo", and "The Big Lebowski".
 Buscemi provides the voice of Randall Boggs in the "Monsters, Inc." franchise.
Gerry is a 2002 American drama film directed by Gus Van Sant and starring Matt Damon and Casey Affleck, who also co-wrote the film with Van Sant.
 It is the first film of Van Sant's "Death Trilogy", three films based on deaths that occurred in real life, and is succeeded by "Elephant" (2003) and "Last Days" (2005).
Harris Savides (September 28, 1957 – October 9, 2012) was an American cinematographer.
 Notable films include Gus Van Sant's "young death" trilogy ("Gerry", "Elephant", and "Last Days"), and the Van Sant films "Milk", "Finding Forrester", and "Restless"; David Fincher's "The Game", "Zodiac", and the opening title sequence in "Seven"; Martin Scorsese's short film "The Key to Reserva"; Wong Kar Wai's short film "The Follow"; Ridley Scott's "American Gangster"; Woody Allen's "Whatever Works"; Sofia Coppola's "Somewhere" and "The Bling Ring"; Noah Baumbach's "Greenberg" and "Margot at the Wedding"; and John Turturro's "Illuminata".