Question: Waylon Smithers, often referred to as Mr. Smithers, debuted in the January 21, 1990 episode of The Simpsons as the personal assistant to which Springfield Nuclear Power Plant owner?
Sentence (from "The Devil Wears Nada"): "The Devil Wears Nada" is the fifth episode of the twenty-first season of "The Simpsons".
Relevant evidence: No