story: [Preston] and his brother [James] were rarely seen apart. [Preston] asked his sister, [Nancy] to do the dishes. [Nancy] was n't feeling well, though, so her daughter [Sabrina] did them instead.
query: ('Preston', 'Sabrina')
clean_story: [Preston] asked his sister, [Nancy] to do the dishes. [Nancy] was n't feeling well, though, so her daughter [Sabrina] did them instead.
proof_state: [{('Preston', 'niece', 'Sabrina'): [('Preston', 'sister', 'Nancy'), ('Nancy', 'daughter', 'Sabrina')]}]