Question: This census-designated place first settled in 1623 is home to a defensive fortification built at the mouth of what river?
{'answer': 'Piscataqua River', 'supporting_facts': [['Kittery Point, Maine', 0], ['Kittery Point, Maine', 1], ['Kittery Point, Maine', 2], ['Fort McClary', 0], ['Fort McClary', 1]]}