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?
{'answer': 'A Fish Called Selma', 'supporting_facts': [['Troy McClure', 0], ['Troy McClure', 1], ['Troy McClure', 2], ['Troy McClure', 3], ['A Fish Called Selma', 4]]}