Question: What country is the screenwriter of the 2003 American psychological horror thriller film directed by Mathieu Kassovitz and starring Halle Berry?

Context articles: Birthday Girl
The Stepfather (1987 film)
The Crimson Rivers
Gothika
The Rich Man's Wife
Perfect Stranger (film)
Rebellion (2011 film)
Things We Lost in the Fire (film)
Sebastian Gutierrez
Brad Anderson (director)

Birthday Girl is a 2001 British comedy thriller film directed by Jez Butterworth.
 The plot focuses on English bank clerk John Buckingham, who orders a Russian mail-order bride, Nadia.
 It becomes clear upon her arrival that Nadia cannot speak English, and early into her stay, two mysterious men come to the house claiming to be her cousin and cousin's friend.
 The film features Nicole Kidman, Ben Chaplin, Mathieu Kassovitz, and Vincent Cassel.
 English and Russian are spoken interchangeably in the film.
The Stepfather is a 1987 American psychological horror thriller film directed by Joseph Ruben and starring Terry O'Quinn, Jill Schoelen and Shelley Hack.
 O'Quinn stars as Henry Morrison, an identity-assuming serial killer who remarries a widow with a teenage daughter.
 After previously killing his family and changing his identity, his killing spree continues after his stepdaughter becomes suspicious about him.
 It is loosely based on the life of mass murderer John List, although the plot is more commonly associated with slasher films of the era than a true story.
 The film was written by Donald E. Westlake, from a story by Westlake, Carolyn Lefcourt and Brian Garfield.
The Crimson Rivers (French: "Les Rivières Pourpres" ) is a 2000 French psychological horror film starring Jean Reno and Vincent Cassel.
 The film, which was directed by Mathieu Kassovitz, is based on the best-selling novel "Les Rivières Pourpres".
 Its screenplay was co-written by the book's author, Jean-Christophe Grangé.
Gothika is a 2003 American psychological horror thriller film directed by Mathieu Kassovitz and written by Sebastian Gutierrez.
 Halle Berry plays a psychiatrist in a women's mental hospital who wakes up one day to find herself on the other side of the bars, accused of having murdered her husband.
 The film was first released on November 21, 2003 in the United States.
 At the time of its release, and despite poor critical reception, "Gothika" was the most financially successful film from Dark Castle Entertainment, with a worldwide gross of $141.6 million.
The Rich Man's Wife is a 1996 American thriller film written and directed by Amy Holden Jones and starring Halle Berry.
 The title character becomes a suspect when her husband is murdered and the investigating detectives are suspicious of her alibi.
Perfect Stranger is a 2007 American neo-noir psychological thriller film, directed by James Foley, and starring Halle Berry and Bruce Willis in their first film together since 1991's "The Last Boy Scout".
 It was produced by Revolution Studios for Columbia Pictures.
Rebellion (French: L'Ordre et la Morale ) is a 2011 French historical drama film directed, produced, co-written, co-edited by and starring Mathieu Kassovitz.
 Set in New Caledonia but filmed in Tahiti, the film recreates a version of the Ouvéa cave hostage taking in 1988.
 Kassovitz, Benoît Jaubert and Pierre Geller were collectively nominated for the 2012 Best Writing (Adaptation) César Award.
Things We Lost in the Fire is a 2007 drama film directed by Susanne Bier and written by Allan Loeb and starring Halle Berry and Benicio del Toro.
 The film was released in the United States and Canada on October 19, 2007 and in the United Kingdom on February 1, 2008.
Sebastian Gutierrez (born September 10, 1974) is a Venezuelan film director, screenwriter and film producer.
 known for writing the screenplays to the films "Gothika", "Snakes on a Plane", "The Eye" and "The Big Bounce", and writing and directing two independent female-driven ensemble comedies, "Women in Trouble" and "Elektra Luxx".
Brad Anderson (born 1964) is an American film director, producer and writer.
 A director of thriller and horror films and television projects, he is best known for having directed "The Machinist" (2004), starring Christian Bale, and "The Call" (2013), starring Halle Berry.
 He also produced and directed several installments of the FOX science fiction television series "Fringe".