Question: FilmNation Entertainment acquired the rights to the 2015 Bill Condon-directed film based on what 2005 novel?
Sentence (from "Mr. Holmes"): Mr. Holmes is a 2015 British–American crime drama mystery film, directed by Bill Condon, based on Mitch Cullin's 2005 novel "A Slight Trick of the Mind", and featuring the character Sherlock Holmes.
Relevant evidence: Yes