Question: Which episode of this season of "The Simpsons"' that had two hold-over episodes from the previous season was written by Ken Keeler, Dan Greaney, and David S. Cohen?
{'answer': 'Treehouse of Horror VII', 'supporting_facts': [['The Simpsons (season 8)', 0], ['The Simpsons (season 8)', 2], ['Treehouse of Horror VII', 3]]}