Question: Frank Albert Fetter, was an American economist of the Austrian School, Fetter's treatise, "The Principles of Economics", contributed to an increased American interest in the Austrian School, including the theories of Friedrich Hayek, was an Austrian-British economist and philosopher best known for his defense, of classical what?
{'answer': 'liberalism', 'supporting_facts': [['Frank Fetter', 1], ['Friedrich Hayek', 0]]}