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 ? 

Context articles: Fifty Shades (film series)
Bound (2015 film)
Fifty Shades (novel series)
9½ Weeks
Fifty Shades of Grey (film)
Fifty Shades of Grey
Fifty Shades Freed (film)
Fifty Shades Darker (film)
Love &amp; Other Drugs
Fifty Shades Darker

Fifty Shades is an American film series that consists of three erotic romantic drama films, based on the " Fifty Shades" trilogy by English author E. L. James.
 It is distributed by Universal Studios and stars Dakota Johnson and Jamie Dornan as the lead roles Anastasia Steele and Christian Grey, respectively.
 Sam Taylor-Johnson directed the first film and initially she was slated to be the director of the sequels as well, however subsequently the second and third films were directed by James Foley.
Bound is a 2015 American erotic romantic thriller drama film written and directed by Jared Cohn and starring Charisma Carpenter and Daniel Baldwin.
 Produced by The Asylum, the film is also a mockbuster of "Fifty Shades of Grey".
The "Fifty Shades" trilogy is a series of erotic novels by E. L. James.
 The trilogy consists of "Fifty Shades of Grey" (2011), "Fifty Shades Darker" and "Fifty Shades Freed" (2012).
 The trilogy traces the deepening relationship between a college graduate, Anastasia Steele, and a young business magnate, Christian Grey.
9½ Weeks (originally titled Nine ½ Weeks) is a 1986 American erotic romantic drama film directed by Adrian Lyne with a screenplay by Sarah Kernochan, Zalman King, and Patricia Louisanna Knop.
 The film is based on the 1978 memoir of the same name by Austrian-American author Ingeborg Day.
 It stars Kim Basinger as Elizabeth McGraw and Mickey Rourke as John Gray.
 McGraw is a New York City art gallery employee who has a brief yet intense affair with a mysterious Wall Street broker.
 The film was completed in 1984, but not released until February 1986.
Fifty Shades of Grey is a 2015 American erotic romantic drama film directed by Sam Taylor-Johnson, with a screenplay by Kelly Marcel.
 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.
Fifty Shades of Grey is a 2011 erotic romance novel by British author E. L. James.
 It is the first instalment in the "Fifty Shades" trilogy that traces the deepening relationship between a college graduate, Anastasia Steele, and a young business magnate, Christian Grey.
 It is notable for its explicitly erotic scenes featuring elements of sexual practices involving bondage/discipline, dominance/submission, and sadism/masochism (BDSM).
 Originally self-published as an ebook and a print-on-demand, publishing rights were acquired by Vintage Books in March 2012.
Fifty Shades Freed is an upcoming American erotic romantic drama film directed by James Foley and written by Niall Leonard, based on the novel of same name by E. L. James.
 It is the final film in the "Fifty Shades" trilogy, and a sequel to "Fifty Shades of Grey" (2015) and "Fifty Shades Darker" (2017).
 The film stars Dakota Johnson and Jamie Dornan as Anastasia Steele and Christian Grey, respectively.
Fifty Shades Darker is a 2017 American erotic romantic drama film directed by James Foley and written by Niall Leonard, based on E. L. James's novel of the same name.
 The second film in the "Fifty Shades" film series, it is the sequel to the 2015 film "Fifty Shades of Grey".
 The film stars Dakota Johnson and Jamie Dornan as Anastasia Steele and Christian Grey, respectively, with Eric Johnson, Eloise Mumford, Bella Heathcote, Rita Ora, Luke Grimes, Victor Rasuk, Kim Basinger and Marcia Gay Harden in supporting roles.
Love & Other Drugs is a 2010 American erotic romantic drama comedy film directed and co-written by Edward Zwick and based on the non-fiction book "Hard Sell: The Evolution of a Viagra Salesman" by Jamie Reidy.
 The film stars Jake Gyllenhaal and Anne Hathaway, who originally starred together in "Brokeback Mountain".
 Oliver Platt, Hank Azaria, Josh Gad and Gabriel Macht also star.
 The film was released in the United States on November 25, 2010, received mixed reviews from critics and grossed $102 million.
Fifty Shades Darker is a 2012 erotic romance novel by British author E. L. James.
 It is the second instalment in the "Fifty Shades" trilogy that traces the deepening relationship between a college graduate, Anastasia Steele, and a young business magnate, Christian Grey.
 The first and third volumes, "Fifty Shades of Grey" and "Fifty Shades Freed", were published in 2011 and 2012.
 The novel is published by Vintage Books and reached No. 1 on the "USA Today" best seller list.