Question: What was the nationality of the person who wrote the original screenplay for "Screamers"?

Context paragraphs:
Screamers (1995 film): Screamers is a 1995 Canadian-American dystopian science fiction film starring Peter Weller, Roy Dupuis, and Jennifer Rubin, and directed by Christian Duguay.  The screenplay, written by Dan O'Bannon with a rewrite by Miguel Tejada-Flores, is based on Philip K. Dick's short story "Second Variety", and addresses themes commonly found in that author's work: societal conflict, confusion of reality and illusion, and machines turning upon their creators.  Although critical reaction to the film was generally negative at the time of its release, it has gained a cult following.  A sequel "", was released in 2009, to equally mixed reviews.

Dinesh Raheja: Dinesh Raheja (born March 31, 1957) is an Indian author, columnist, TV scriptwriter, film historian.  Raheja has been writing on cinema for over 30 years.  In his long and prolific career as a writer, he has worked as the Editor of "Movie magazine" (1988-1999), Channel Editor of "India Today’s" online film section and Editor of "Bollywood News Service".  He has been a regular columnist for rediff.com and "Sunday Mid-day" for over a decade and his articles have been published in "The Times of India", "The Indian Express", "The Hindustan Times", "India Today" and "Outlook".  Raheja is a committed film historian and has authored five books: "The Hundred Luminaries of Hindi Cinema" (1996), "Indian Cinema", "The Bollywood Saga (2004)", "Sahib Bibi Aur Ghulam: The Original Screenplay (2012)", "Chaudhvin Ka Chand: The Original Screenplay (2014)" and "Kaagaz Ke Phool – The Original Screenplay" (2015).

Guillermo Arriaga: Guillermo Arriaga Jordán (] ; born 13 March 1958) is a Mexican author, screenwriter, director and producer.  Self-defined as "a hunter who works as a writer," he is best known for his Academy Award for Best Original Screenplay and BAFTA Award for Best Original Screenplay nomination's for "Babel" and his screenplay for "The Three Burials of Melquiades Estrada", which received the 2005 Cannes Best Screenplay Award.

Venezuelan nationality law: Venezuelan nationality law is based on the principle of Jus soli.  Any person born in Venezuela acquires Venezuelan citizenship at birth, irrespective of nationality or status of parents.  Nationality law is regulated by Section 1 of Chapter 2 of the Constitution of Venezuela and by the Nationality and Citizenship Act of 2004 .

Diablo Cody: Brook Busey-Maurio (born June 14, 1978), better known by the pen name Diablo Cody, is an American writer, producer, stripper and exotic dancer.  She first became known for her candid chronicling of her year as a stripper in her "The Pussy Ranch" blog and in her memoir "" (2005).  Later, Cody achieved critical acclaim for her debut script "Juno" (2007), winning awards such as the Academy Award for Best Original Screenplay, the BAFTA Award for Best Original Screenplay, the Independent Spirit Award for Best First Screenplay and the Writers Guild of America Award for Best Original Screenplay.

Multiple citizenship: Multiple citizenship, also called dual citizenship or multiple nationality or dual nationality, is a person's citizenship status, in which a person is concurrently regarded as a citizen of more than one state under the laws of those states.  There is no international convention which determines the nationality or citizen status of a person, which is defined exclusively by national laws, which vary and can be inconsistent with each other.  Multiple citizenship arises because different countries use different, and not necessarily mutually exclusive, criteria for citizenship.  Colloquial speech refers to people "holding" multiple citizenship but technically each nation makes a claim that this person be considered its national.

Marion Jackson: Marion Jackson (December 3, 1897 – November 28, 1962) was an American screenwriter of the late silent and early sound film eras.  During her fifteen-year career she would pen the scripts for over 40 films, both original and adaptations.  Born in Walla Walla, Washington, she wrote her first script, an original screenplay, which was produced by Monogram Pictures in 1924, "The Mask of Lopez", directed by Albert Rogell.  It would be her most prolific year, as she would contribute to 11 screenplays that year, either as the screenwriter, or providing the story, or adapting from another source.  One of the films she adapted that year was 1924's "A Boy of Flanders", from Marie Louise de la Ramée's 1872 novel, "A Dog of Flanders".  The film was directed by Victor Schertzinger, and starred Jackie Coogan.  Some of her notable films were her 1928 adaptation of "The Shepherd of the Hills", based on the 1907 novel of the same name by Harold Bell Wright; her original screenplay for The Wagon Master (1929), starring Ken Maynard; and the hit film, "Min and Bill" (1930), which she co-wrote with Frances Marion, which stars Marie Dressler and Wallace Beery.

Academy Award for Best Original Screenplay: The Academy Award for Best Original Screenplay is the Academy Award for the best screenplay not based upon previously published material.  It was created for 1940 as a separate writing award from the Academy Award for Best Story.  Beginning with the Oscars for 1957, the two categories were combined to honor only the screenplay.  In 2002, the name of the award was changed from Writing (Screenplay Written Directly for the Screen) to Writing (Original Screenplay).

Dan O'Bannon: Daniel Thomas "Dan" O'Bannon (September 30, 1946 – December 17, 2009) was an American film screenwriter, director, visual effects supervisor, and occasional actor, usually in the science fiction and horror genres.

AACTA Award for Best Original Screenplay: The AACTA Award for Best Original Screenplay is an award presented by the Australian Academy of Cinema and Television Arts (AACTA), for an Australian screenplay "written directly and originally for the screen".  Prior to the establishment of the Academy in 2011, the award was presented by the Australian Film Institute (AFI) at the annual Australian Film Institute Awards (more commonly known as the AFI Awards).  It was first handed out in 1978 when the award for Best Screenplay (which was first presented at the 1974-75 awards) was split into two categories: Best Original Screenplay and Best Adapted Screenplay.  The award has since been presented intermittently from 1978-1979, 1983-1987, 1989, 1993-2006, and then from 2008-present.

Supporting paragraphs: Screamers (1995 film) Dan O'Bannon
Answer: American