Question: Which American-born British socialite was Montagu Porch's stepdaughter, and Randolph Churchill's wife?
{'answer': 'Lady Randolph Churchill', 'supporting_facts': [['Montagu Porch', 0], ['Montagu Porch', 5], ['Montagu Porch', 6], ['Montagu Porch', 8], ['Lady Randolph Churchill', 0]]}