Question: What duo in the Simpsons episode "Gump Roast" usually appear in the Treehouse of Horror episodes?
{'answer': 'Kang and Kodos', 'supporting_facts': [['Gump Roast', 0], ['Gump Roast', 1], ['Gump Roast', 2], ['Kang and Kodos', 0], ['Kang and Kodos', 2], ['Kang and Kodos', 5]]}