Question: Harrah's Lake Tahoe is a hotel and casino owned and operated by the fourth-largest gaming company in the world, with annual revenues of what in 2013?
{'answer': '$8.6 billion', 'supporting_facts': [["Harrah's Lake Tahoe", 0], ["Harrah's Lake Tahoe", 1], ['Caesars Entertainment Corporation', 0], ['Caesars Entertainment Corporation', 1]]}