story: [Preston] went to visit his sister [Nancy] to the hospital last week. [Nancy] and her daughter [Maria] went out to dinner. [Nancy] is married to Thomas and when she was 24, the couple welcomed [Claire] into the world.
query: ('Preston', 'Maria')
clean_story: [Preston] went to visit his sister [Nancy] to the hospital last week. [Nancy] and her daughter [Maria] went out to dinner.
proof_state: [{('Preston', 'niece', 'Maria'): [('Preston', 'sister', 'Nancy'), ('Nancy', 'daughter', 'Maria')]}]