Question: Which U.S. Senator won re-election to a third term in which  James Charles Slattery was the Democratic candidate in 2008?
{'answer': 'Pat Roberts', 'supporting_facts': [['Jim Slattery', 0], ['Jim Slattery', 1], ['United States Senate election in Kansas, 2008', 0], ['United States Senate election in Kansas, 2008', 1]]}