Question: "Treehouse of Horror" is the third episode of "The Simpsons"' which number season, and is the first episode to have the music composed by Alf Clausen, an American film and television composer?
Sentence (from "Alf Clausen"): He is best known for his work scoring many episodes of "The Simpsons", of which he had been the sole composer between 1990 and 2017.
Relevant evidence: No