Question: The series of poker tournaments sponsored by the corporation formerly known as "Harrah's entertainment" uses what playing cards as their official cards?
{'answer': 'Copag', 'supporting_facts': [['Copag', 0], ['Copag', 1], ['Copag', 2], ['Copag', 3], ['Copag', 4], ['Copag', 5], ['Copag', 6], ['World Series of Poker', 0]]}