Question: Craig Warner wrote the screenplay "Codebreaker" about a computer scientist of what nationality?

Context articles: Craig Warner
Annie Easley
David H. Bailey
Anil Menon
David Peleg
Edwin Catmull
Alan Turing: The Enigma
Alan Turing
Nuria Oliver
Jeffrey Shallit

Craig Warner (born 25 April 1964) is a multiple award-winning playwright and screenwriter who lives and works in Suffolk, England.
 He wrote "The Queen's Sister" for Channel 4, which was nominated for several BAFTA awards (including Best Single Drama), "Maxwell" for BBC2, which garnered a Broadcasting Press Guild Award nomination for Best Single Drama and won David Suchet an International Emmy for Best Actor, and "The Last Days of Lehman Brothers", for which Warner was longlisted for a BAFTA Craft Award for Best Writer, and which won him the award for Best Writer at the Seoul International Drama Awards in 2010.
 He wrote the mini-series "Julius Caesar" for Warner Bros., which gained Warner a Writers Guild Award nomination for Best Original Long-Form Drama, and he performed an extensive uncredited rewrite on "The Mists of Avalon", also for Warner Bros., which was nominated for a Writers Guild Award and nine Emmys, including Best Mini-series.
 Warner wrote the screenplay for "Codebreaker", a film about Alan Turing.
Annie J. Easley (April 23, 1933 – June 25, 2011) was an African-American computer scientist, mathematician, and rocket scientist.
 She worked for the Lewis Research Center (now Glenn Research Center) of the National Aeronautics and Space Administration (NASA) and its predecessor, the National Advisory Committee for Aeronautics (NACA).
 She was a leading member of the team which developed software for the Centaur rocket stage and one of the first African-Americans to work as a computer scientist at NASA.
David Harold Bailey (born 1948) is a mathematician and computer scientist.
 He received his B.S. in mathematics from Brigham Young University in 1972 and his Ph.D. in mathematics from Stanford University in 1976.
 He worked for 14 years as a computer scientist at NASA Ames Research Center, but since 1998 has been at the Lawrence Berkeley National Laboratory.
 He is now officially retired, but continues as an active researcher.
 He is also a Research Associate at the University of California, Davis, Department of Computer Science.
Anil Menon is a leading Indian writer of speculative fiction, as well as a computer scientist with a Ph.D. from Syracuse University, who has authored research papers and edited books on Evolutionary Algorithms; his research addressed the mathematical foundations of replicator systems, majorization, and reconstruction of probabilistic databases, in collaboration with Professors Kishan Mehrotra, Chilukuri Mohan, and Sanjay Ranka.
 After working for several years as a computer scientist, he has directed his creative energies towards fiction.
 His short stories and reviews have appeared in the anthology series Exotic Gothic, "Strange Horizons", Interzone", "Lady Churchill's Rosebud Wristlet", "Chiaroscuro", "Sybil's Garage", "Apex Digest" and other magazines.
 In 2009, Zubaan Books, India's leading feminist press, published his debut young adult novel "The Beast With Nine Billion Feet".
 It was shortlisted for the 2010 Vodafone Crossword Book Award.
 In 2009, in conjunction with Vandana Singh and Suchitra Mathur, he helped organize India's first in-residence, three-week speculative fiction workshop at IIT-Kanpur.
"For the computer scientist of the same name, see David Peleg (computer scientist)".
Edwin Earl Catmull (born March 31, 1945) is a computer scientist and current president of Pixar and Walt Disney Animation Studios (including the latter's DisneyToon Studios division).
 As a computer scientist, Catmull has contributed to many important developments in computer graphics.
Alan Turing: The Enigma (1983) is a biography of the British mathematician, codebreaker, and early computer scientist, Alan Turing (1912–1954) by Andrew Hodges.
 The book covers Alan Turing's life and work.
 The American 2014 film "The Imitation Game" is loosely based on the book, with dramatization.
Alan Mathison Turing ( ; 23 June 1912 – 7 June 1954) was an English computer scientist, mathematician, logician, cryptanalyst, philosopher and theoretical biologist.
Nuria Oliver is a computer scientist.
 She is Director of Data Science Research at Vodafone and Chief Data Scientist at DataPop Alliance.
 Previously, she was Scientific Director at Telefónica and a researcher at Microsoft Research.
 She holds a PhD from the Media Lab at MIT, and is an IEEE Fellow.
 She is one of the most cited female computer scientist in Spain, with her research having been cited by more than 11800 publications.
 She is well known for her work in computational models of human behavior, human computer-interaction, mobile computing and big data for social good.
Jeffrey Outlaw Shallit (born October 17, 1957) is a computer scientist, number theorist, a noted advocate for civil liberties on the Internet, and a noted critic of intelligent design.
 He is married to Anna Lubiw, also a computer scientist.