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 "Who Shot Mr. Burns?"): Part One is the twenty-fifth and final episode of the sixth season and originally aired on the Fox network in the United States on May 21, 1995, while Part Two is the season premiere of the seventh season and aired on September 17, 1995.
Relevant evidence: No