Question: The doll which is a fusion a white girl child with a Southern United States archetype for a black woman who worked as a nanny is dated to what year?
{'answer': '1950s', 'supporting_facts': [['Topsy-Turvy doll', 0], ['Topsy-Turvy doll', 1], ['Topsy-Turvy doll', 2], ['Topsy-Turvy doll', 3], ['Mammy archetype', 0]]}