story: [Christopher]'s son [William] went to the baseball game with his sister [Dorothy], who was sick.
query: ('Dorothy', 'William')
clean_story: [Christopher]'s son [William] went to the baseball game with his sister [Dorothy], who was sick.
proof_state: [{('Dorothy', 'nephew', 'William'): [('Dorothy', 'brother', 'Christopher'), ('Christopher', 'son', 'William')]}]