Question: Who directed the 2017 American erotic romantic drama based on E. L. James's novel that is the sequel to a 2015 American erotic romantic drama film directed by Sam Taylor-Johnson about a college graduate who begins a sadomasochistic relationship with young business magnate ? 
Sentence (from "Fifty Shades of Grey (film)"): The film is based on the eponymous 2011 novel by British author E. L. James and stars Dakota Johnson as Anastasia Steele, a college graduate who begins a sadomasochistic relationship with young business magnate Christian Grey, played by Jamie Dornan.
Relevant evidence: No