Question: One of the proposers of the first railroad built in the state of New York surveyed portions of what land for the US government?
{'answer': 'the Louisiana Purchase', 'supporting_facts': [['George William Featherstonhaugh', 1], ['George William Featherstonhaugh', 2], ['Albany and Schenectady Railroad', 1], ['Albany and Schenectady Railroad', 30]]}