Question: Waylon Smithers appeared an episode of The Simpsons that originally aired on January 21, 1990, and that has Homer promoted to what position?
Sentence (from "Homer's Odyssey (The Simpsons)"): It was written by Jay Kogen and Wallace Wolodarsky and was the first "Simpsons" script to be completed, although it was the third episode produced.
Relevant evidence: No