Question: Who is the husband of the screenwriter for the 2009 science fiction thriller directed by Alex Proyas and starring Nicholas Cage?

Context paragraphs:
Antibody (film): Antibody is a 2002 science fiction thriller directed and edited by Christian McIntire that debuted as a Sci Fi Pictures TV-movie on the Sci Fi Channel on February 8, 2002.

Camera (2014 film): Camera is a 2014 Hong Kong-Singaporean science fiction thriller directed by James Leong and co-written by Ben Slater and Leong.  It stars Sean Li as a surveillance expert who falls in love with his newest target, played by Venus Wong.  It premiered at the 2014 Bucheon International Fantastic Film Festival.  It is Leong's first narrative film.

Extracted: Extracted, also known as Extraction in the UK, is an independent 2012 American science fiction thriller directed and written by Nir Paniry.  Sasha Roiz stars as a scientist whose consciousness becomes trapped in the mind of a convict (Dominic Bogart) who volunteered to be a part of an experimental procedure.

Dark City (1998 film): Dark City is a 1998 American-Australian neo-noir science fiction film directed by Alex Proyas.  The screenplay was written by Proyas, Lem Dobbs and David S. Goyer.  The film stars Rufus Sewell, Kiefer Sutherland, Jennifer Connelly, and William Hurt.  Sewell plays John Murdoch, an amnesiac man who finds himself suspected of murder.  Murdoch attempts to discover his true identity and clear his name while on the run from the police and a mysterious group known only as the "Strangers".

Juliet Snowden: Juliet Snowden is an American screenwriter, film director, and producer, best known for writing "Knowing" and "Ouija".  She is also known for co-writing screenplays with her husband Stiles White.

List of accolades received by District 9: "District 9" is a 2009 science fiction thriller film directed by Neill Blomkamp.  The National Board of Review has named it one of the top 10 independent film of 2009.  It received four Academy Awards nominations, seven British Academy Film Awards nominations, five Broadcast Film Critics Association nominations, and one Golden Globe nomination.  It is the fourth film ever nominated for Best Picture at the Academy Awards for TriStar Pictures.

Garage Days: Garage Days is a 2002 Australian film directed by Alex Proyas and written by Proyas, Dave Warner and Michael Udesky.  The "Garage Days" soundtrack includes the song "Garage Days" featuring Katie Noonan, David McCormack and Andrew Lancaster.

Synapse (film): Synapse is a science fiction thriller directed by music video director Kenlon Clark.  The screenplay was written by Adam G. Simon who also penned the original story and screenplay for "Man Down".  Simon also stars in the film alongside Sophina Brown, Henry Simmons, Joshua Alba, Charley Boon and Will Rubio.  The sound design for the film was done by Emmy Award winning sound designer Michael Archacki and the score was created by Christian Davis.

I, Robot (film): I, Robot (stylized as i,robot ) is a 2004 American neo-noir dystopian science fiction action film directed by Alex Proyas.  The screenplay by Jeff Vintar and Akiva Goldsman is from a screen story by Vintar, suggested by Isaac Asimov's short-story collection of the same name.  The film stars Will Smith, Bridget Moynahan, Bruce Greenwood, James Cromwell, Chi McBride, Alan Tudyk and Shia LaBeouf.

Knowing (film): Knowing (stylized as KNOW1NG) is a 2009 science fiction thriller film directed by Alex Proyas and starring Nicolas Cage.  The project was originally attached to a number of directors under Columbia Pictures, but it was placed in turnaround and eventually picked up by Escape Artists.  Production was financially backed by Summit Entertainment.  "Knowing" was filmed in Docklands Studios Melbourne, Australia, using various locations to represent the film's Boston-area setting.

Supporting paragraphs: Juliet Snowden Knowing (film)
Answer: Stiles White