Title: The Amateur (1999 film)
Content:  The Amateur (El Amateur) is an Argentine drama film released in 1999, written and directed by Juan Bautista Stagnaro. The film was based on a novel by Mauricio Dayub. The picture was nominated for five Silver Condor Awards.
Title: Amateur (2018 film)
Content:  Amateur is a 2018 American sports drama film about a young basketball future star struggling with his personal life in pursuit of his dream. The film was released in the United States on April 6, 2018 on Netflix.
Title: Amateur Daddy
Content:  Amateur Daddy is a 1932 American drama film directed by John G. Blystone and written by Frank Dolan and Doris Malloy. The film stars Warner Baxter, Marian Nixon, Rita La Roy, William Pawley, Lucille Powers and David Landau. The film was released on April 10, 1932, by Fox Film Corporation.
Title: The Amateur (1999 film)
Content: Mauricio Dayub as Alfonso 'Pájaro' Romero ; Pedro Heredia as Ramón ; Vando Villamil as Lopecito ; Arturo Goetz as Concejal ; Cacho Espíndola as Intendente ; Alejandra Puy as La Mora ; Darío Grandinetti as Funcionario municipal 
Title: Amateur (2018 film)
Content: Michael Rainey Jr. as Terron Forte ; Tekola Cornetet as Stevion ; Walter Anaruk as Coach Nguyen ; Sharon Leal as Nia, Terron's mother ; Brian J. White as Vince, Terron's father ; Ketrick Copeland as Byron ; Josh Charles as Coach Gaines ; Corey Parker Robinson as Coach Curtis ; James Siakam as Olembe ; Stefan Frank as Petrus ; Ashlee Brian as Anton 
Title: Amateur Daddy
Content: Warner Baxter as Jim Gladden ; Marian Nixon as Sally Smith ; Rita La Roy as Lotti Pelgram ; William Pawley as 2nd Fred Smith ; Lucille Powers as Olive Smith ; David Landau as Sam Pelgram ; Clarence Wilson as William J. 'Bill' Hansen ; Frankie Darro as Pete Smith ; Gail Kornfeld as Lily Smith ; Joe Hachey as Sam Pelgram, Jr. ; Edwin Stanley as 1st Fred Smith ; Joan Breslau as Nancy Smith 
Title: Amateur film
Content:   Amateur film is the low-budget hobbyist art of film practised for passion and enjoyment and not for business purposes.
Title: Amateur
Content:  An amateur is generally considered a person who pursues an avocation independent from their source of income. Amateurs and their pursuits are also described as popular, informal, self-taught, user-generated, DIY, and hobbyist.
Title: Amateur film
Content: Ian Craven (ed.) Movies on Home Ground: Explorations in Amateur Cinema. Cambridge: Cambridge Scholars Publishing. ; Francis Dyson (2012) Challenging assumptions about amateur film of the inter-war years: Ace movies and the first generation of London based cine-clubs. Unpublished PhD thesis, Norwich: University of East Anglia ; Karen L. Ishizuka and Patricia Zimmerman (eds.) (2008) Mining the Home Movies: Excavations in Histories and Memories. Berkeley: University of California Press. ; Heather Norris Nicholson (2012) Amateur Film: Meaning and Practice, 1927-77. Manchester: Manchester University Press. ; Ryan Shand and Ian Craven (eds.) (2013) Small Gauge Storytelling: Discovering the Amateur Fiction Film. Edinburgh University Press. 
Title: Amateur (2018 film)
Content:  14-year-old basketball phenom Terron Forte has to navigate the under-the-table world of amateur basketball when he is recruited to an elite NCAA prep school.

Question: Who was the screenwriter for Amateur?
Answer: Hal Hartley.