Question: Which of these documentaries was first to premier, This Film Is Not Yet Rated or Welcome to Leith?
Sentence (from "Welcome to Leith"): The film premiered on January 26, 2015 at the 2015 Sundance Film Festival and, after a limited theatrical release on September 9, was broadcast on PBS' series "Independent Lens" on April 4, 2016.
Relevant evidence: Yes