Sara Bennett is a visual effects artist that worked on what 2015 film directed by Alex Garland?
Sara Bennett:  Best known for her works in "Harry Potter and the Chamber of Secrets" (2002), "Harry Potter and the Prisoner of Azkaban" (2004), "Harry Potter and the Goblet of Fire" (2005), "Doctor Who" (2005), "Merlin" (2008), "Jonathan Strange & Mr Norrell" (2009), "Skellig" (2009), "The Martian" (2015) and "Ex Machina" (2015).
i don't know