Question: Liz Rose, is an American country music songwriter best known for her work with Taylor Swift, and  has co-written twenty of Swift's officially-released songs and singles, including which song was written by Swift and Liz Rose and produced by Nathan Chapman, with Swift's aid?
{'answer': 'White Horse', 'supporting_facts': [['Liz Rose', 1], ['White Horse (Taylor Swift song)', 0]]}