Question: Who wrote the eighteenth episode of the seventh season of "Pretty Little Liars", featuring Shay Mitchell as Emily?
Sentence (from "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.
Relevant evidence: Yes