Question: In which "The Simpsons" episode written by Jack Barth and directed by Mark Kirkland does this fictional character (who usually does low-level work) voiced by Phil Hartman appear as the main character?
Sentence (from "All Singing, All Dancing"): "All Singing, All Dancing" is the eleventh episode of "The Simpsons"<nowiki>'</nowiki> ninth season.
Relevant evidence: No