Question: The American actor and professional chef who hosted an American reality television series that showcases America's most exclusive and extravagant homes, was known for starring on what t.v. show?
{'answer': 'How I Met Your Mother', 'supporting_facts': [['A-List Listings', 1], ['David Burtka', 0], ['David Burtka', 1], ['David Burtka', 2]]}