Question: Who wrote the eighteenth episode of the seventh season of "Pretty Little Liars", featuring Shay Mitchell as Emily?

full_context: Document 1: Lucy Hale: Karen Lucille Hale (born June 14, 1989) is an American actress and singer. Earlier in her career, she was sometimes credited as Lucy Kate Hale. Hale first came to prominence as one of the five winners of the reality show "American Juniors", a children's spin off of "American Idol". She is best known for her role as Aria Montgomery on the Freeform series "Pretty Little Liars", which won her a People's Choice Award for Favorite Cable TV Actress in 2014. The same year, she released her debut studio album, "Road Between".
Document 2: Aria Montgomery: Aria Marie Montgomery is a fictional character in the "Pretty Little Liars" series by Sara Shepard. She is portrayed by Lucy Hale in the television adaptation, which premiered on ABC Family in June 2010. Lucy Hale was named Choice Summer TV Star: Female at the 2010 Teen Choice Awards and 2011 Teen Choice Awards for her role in the series.
Document 3: Pretty Little Liars (book series): Pretty Little Liars is a series of young adult novels by Sara Shepard. Beginning with 2006's initial novel of the same name, the series follows the lives of four girls – Spencer Hastings, Hanna Marin, Aria Montgomery and Emily Fields.
Document 4: Lindsey Shaw: Lindsey Shaw (born May 10, 1989) is an American actress. She is known for playing Jennifer "Moze" Mosely on the Nickelodeon series, "Ned's Declassified School Survival Guide". She also co-starred in the 2007 CW sitcom "Aliens in America", and was the lead on ABC Family's 2009 comedy series "10 Things I Hate About You". Since 2011-2017 she played the recurring role of Paige McCullers on the ABC Family teen drama series "Pretty Little Liars".
Document 5: Choose or Lose: "Choose or Lose" is the eighteenth episode of the seventh season of "Pretty Little Liars", and the show's 158th episode overall, which premiered on the Freeform network in the United States on June 13, 2017. The episode was directed by Norman Buckley and written by Charlie Craig. In this episode, the Liars finally discover that Aria (Lucy Hale) has been working with 'A.D.' after Mona (Janel Parrish) investigated on Aria. Lieutenant Tanner (Roma Maffia) returns to Rosewood to work on the Dunhill's homicide case, quickly targeting the Liars on her radar. Caleb (Tyler Blackburn) and Hanna (Ashley Benson) secretly marry, while Alison (Sasha Pieterse) and Emily (Shay Mitchell) step forward with their relationship.
Document 6: Shelley Hennig: Shelley Catherine Hennig (born January 2, 1987) is an American model and actress. She is also a beauty pageant titleholder who held the Miss Teen USA 2004 title. She played Stephanie Johnson on "Days of Our Lives" and starred in the CW series "The Secret Circle" as Diana Meade. She played the character Malia Tate in "Teen Wolf". Hennig also starred in horror films "Unfriended" as Blaire Lily and "Ouija" as Debbie Galardi. She has been nominated for two Emmys for her role on "Days of Our Lives". She has won a 2016 Teen Choice Award.
Document 7: Game On, Charles: "Game On, Charles" is the first episode of the sixth season of the American mystery drama series "Pretty Little Liars", and is the 121st episode overall. It originally aired on June 2, 2015, ABC Family and serves as the season premiere of the sixth season. The episode was directed by Chad Lowe and was written by showrunner I. Marlene King and Lijah J. Barasz.
Document 8: Ashley Benson: Ashley Victoria Benson (born December 18, 1989) is an American actress, known for portraying the role of Hanna Marin in the teen mystery-drama television series "Pretty Little Liars" (2010-2017). She has also portrayed Abigail Deveraux on the NBC soap opera "Days of Our Lives", Mia Torcoletti on the supernatural television series "Eastwick", and Brit in the 2013 crime thriller film "Spring Breakers".
Document 9: Lauren Ash: Lauren Elizabeth Ash (born February 4, 1983) is a Canadian-born actress from Belleville, Ontario. She is also an alumna of both Second City Toronto Mainstage and Second City Chicago mainstage and is one half of sketch comedy duo "Cory!" She is a two-time Canadian Comedy Award winner for Best Female Improviser in 2006 and 2007 and has also won for Best Performance by a Female - Television for "Almost Heroes" in 2012, Best Comedic Play in 2008 , Best Sketch Troupe in 2006, and in 2015 won Best Female Performance in a Feature Film for her role as Carol in the movie Dirty Singles.
Document 10: Sherri Mitchell: Sherri Mitchell is a Penobscot attorney and activist from Maine. Mitchell is an attorney with the Native American Unit of Pine Tree Legal Assistance. She is also the executive director of the Land Peace Foundation, which is dedicated to the protection of indigenous land rights. Mitchell has been actively involved with the Idle No More movement for indigenous rights in Canada and abroad.
Document 11: Shay Mitchell: Shannon Ashley "Shay" Mitchell (born April 10, 1987) is a Canadian actress, model, entrepreneur and author. She is best known for her role as Emily Fields in the Freeform series "Pretty Little Liars".
Document 12: Chuck Versus the Honeymooners: "Chuck Versus the Honeymooners" is the 14th episode of the third season of "Chuck". It originally aired on April 26, 2010. When Chuck and Sarah go AWOL after the death of Daniel Shaw, Beckman sends the newly reinstated Casey and Morgan to bring them back. Meanwhile, Ellie is upset that her brother may miss her going away party before she and Devon leave to join Doctors without Borders in Africa.
Document 13: Seven Minutes in Hell: "Seven Minutes in Hell" is the sixth episode of the horror black comedy series "Scream Queens". It first aired on October 20, 2015 on Fox. The episode directed by Michael Uppendahl and written by Ryan Murphy. In this episode, Chanel (Emma Roberts) makes a surprising decision: to protect herself from the Red Devil by leaving Zayday in position of power and win the election as president of Kappa Kappa Tau. When the Kappa girls hold a slumber party, it costs the life of some people and a shocking discovery is made. The episode title refers to the game Seven Minutes in Heaven, one of the ones played by the Kappa Kappa Tau sisters and Dickie Dollar Scholars brothers in this episode as part of the slumber party.
Document 14: List of Pretty Little Liars episodes: "Pretty Little Liars" is a TV series which premiered on ABC Family on June 8, 2010. Developed by I. Marlene King, the series is based on the "Pretty Little Liars" book series by Sara Shepard. The series follows the lives of four girls, Aria Montgomery, Hanna Marin, Emily Fields, and Spencer Hastings, whose clique falls apart after the disappearance of their leader, Alison DiLaurentis. One year later, the estranged friends are reunited as they begin receiving messages from a mysterious figure named "A" who threatens to expose their deepest secrets, including ones they thought only Alison knew.
Document 15: A Is for Answers: "A Is for Answers" is the twenty-fourth episode of the fourth season and the ninety-fifth episode of the ABC Family mystery drama series "Pretty Little Liars". The episode, serving as the fourth-season finale and the winter finale, was broadcast on March 18, 2014. It was directed and written by I. Marlene King and features a guest appearance from Ryan Merriman, his first since the second-season episode "The Blond Leading the Blind", as Ian Thomas, Melissa Hastings' deceased husband who was suspected of killing Alison.
ground_truth: Charlie Craig