Question: Who produced the movie based on the novel "Schindler's Ark" by Australian novelist Thomas Keneally with screenplay by Steven Ernest Bernard Zaillian?

Context paragraphs:
Moses the Lawgiver (novel): Moses the Lawgiver (1975) is a novel by Australian writer Thomas Keneally.  The novel is based on the British television series "Moses the Lawgiver", for which Anthony Burgess wrote the script.

Steven Zaillian: Steven Ernest Bernard Zaillian (born January 30, 1953) is an American screenwriter, director, film editor, producer.  He won an Academy Award, a Golden Globe Award and a BAFTA Award for his screenplay "Schindler's List" (1993) and has also earned Oscar nominations for "Awakenings", "Gangs of New York" and "Moneyball".  He was presented with the Distinguished Screenwriter Award at the 2009 Austin Film Festival and the Laurel Award for Screenwriting Achievement from the Writers Guild of America in 2011.  Zaillian is the founder of Film Rites, a film production company.

Thomas Keneally: Thomas Michael Keneally, AO (born 7 October 1935) is a prolific Australian novelist, playwright, and essayist.  He is best known for writing "Schindler's Ark", the Booker Prize-winning novel of 1982 which was inspired by the efforts of Poldek Pfefferberg, a Holocaust survivor.  The book would later be adapted to Steven Spielberg's "Schindler's List", which won the Academy Award for Best Picture.

The Playmaker: The Playmaker is a novel based in Australia written by the Australian author Thomas Keneally.

Poldek Pfefferberg: Leopold "Poldek" Pfefferberg (March 20, 1913 – March 9, 2001), also known as Leopold Page, was a Polish-American Holocaust survivor who inspired the Australian writer Thomas Keneally to write the Booker prize-winning novel "Schindler's Ark", which in turn was the basis for Steven Spielberg's film "Schindler's List".

Leo Rosner: Leopold "Leo" Rosner (26 June 1918 – 10 October 2008) was a Polish-born Australian Jewish musician.  Rosner survived the Holocaust in Nazi concentration camps during World War II by playing his accordion for Nazi guards and officials, earning the attention of Oskar Schindler who likely saved his life.  His survival story became known after Australian author Thomas Kenneally's 1982 novel, "Schindler's Ark", was adapted into Steven Spielberg's Oscar-winning film, "Schindler's List".  He appeared in the epilogue of the film at the Schindler memorial in Yad Vashem, Israel.

The Chant of Jimmie Blacksmith: The Chant of Jimmie Blacksmith is a 1972 Booker Prize-nominated novel by Thomas Keneally, and a 1978 Australian film of the same name directed by Fred Schepisi.  The novel is based on the life of bushranger Jimmy Governor, the subject of an earlier book by Frank Clune.

Schindler's List: Schindler's List is a 1993 American epic historical period drama film directed and co-produced by Steven Spielberg and scripted by Steven Zaillian.  It is based on the novel "Schindler's Ark" by Australian novelist Thomas Keneally.  The film relates a period in the life of Oskar Schindler, an ethnic German businessman, during which he saved the lives of more than a thousand mostly Polish-Jewish refugees from the Holocaust by employing them in his factories during World War II.  It stars Liam Neeson as Schindler, Ralph Fiennes as SS officer Amon Göth, and Ben Kingsley as Schindler's Jewish accountant Itzhak Stern.

The Fear (novel): The Fear (1965) is a novel by Australian writer Thomas Keneally.  The novel is also known by the title "By the Line".

Schindler's Ark: Schindler's Ark (released in America as Schindler's List) is a Booker Prize-winning historical fiction novel published in 1982 by Australian novelist Thomas Keneally, which was later adapted into the highly successful movie "Schindler's List" directed by Steven Spielberg.  The United States version of the book was called "Schindler's List" from the beginning; it was later re-issued in Commonwealth countries under that name as well.  The novel was also awarded the Los Angeles Times Book Prize for Fiction in 1983.

Supporting paragraphs: Steven Zaillian Schindler's List
Answer: Steven Spielberg