story: [Minnie] visited her brother [Preston] in New York. His sister [Crystal] was there too. [Crystal]'s daughter, [Mary], just graduated high school.
query: ('Crystal', 'Minnie')
clean_story: [Minnie] visited her brother [Preston] in New York. His sister [Crystal] was there too.
proof_state: [{('Crystal', 'sister', 'Minnie'): [('Crystal', 'brother', 'Preston'), ('Preston', 'sister', 'Minnie')]}]