Question: Peter Kalifornsky was the great grand son of Qadanalchen who worked in a the hub of the southernmost Russian settlements in North America from 1812 to 1842 that has been the subject of what?
{'answer': 'archaeological investigation', 'supporting_facts': [['Peter Kalifornsky', 0], ['Peter Kalifornsky', 3], ['Fort Ross, California', 0], ['Fort Ross, California', 1], ['Fort Ross, California', 2]]}