Question: Valhalla is a hamlet and census-designated place (CDP) located within the town of Mount Pleasant, in Westchester County, is a county in the U.S. state of New York, it is the second-most populous county on the mainland of New York, after which location?
{'answer': 'Bronx', 'supporting_facts': [['Valhalla, New York', 0], ['Westchester County, New York', 1]]}