Question: What town is closest to the castle once owned by the Scottish inventor who invented a military cannon described by Isaac Newton as "destructive to the human species"?
{'answer': 'Aberchirder, Aberdeenshire, Scotland', 'supporting_facts': [['David Gregory (physician)', 0], ['David Gregory (physician)', 4], ['Kinnairdy Castle', 0], ['Kinnairdy Castle', 1]]}