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"): Fifty Shades of Grey is a 2011 erotic romance novel by British author E. L. James.
Relevant evidence: No