Question: What American politician, who was the first formally designated floor leader in the United States Senate, lived at 2000 G Street in Washington, D.C. from 1914 to 1925?
{'answer': 'Oscar Wilder Underwood', 'supporting_facts': [['Oscar W. Underwood House', 0], ['Oscar W. Underwood House', 1], ['Oscar Underwood', 0], ['Oscar Underwood', 1]]}