Question: Prussia is a historical region stretching from Gdańsk Bay to the end of Curonian Spit on the southeastern coast of the Baltic Sea, and extending inland as far as Masuria, Suebi, Goths and other Germanic people lived on both sides of the Vistula River, adjacent to which ancient people first described by the Roman historian Tacitus in his treatise "Germania" (circa 98 CE)?
{'answer': 'Aesti', 'supporting_facts': [['Prussia (region)', 1], ['Aesti', 0]]}