story: [Anna] and her father, [Christopher], went to the carnival. [Christopher] took [Anna] on the Tilt-o-Whirl. [William] went to the park with his father, [Christopher].
query: ('Anna', 'William')
clean_story: [Anna] and her father, [Christopher], went to the carnival. [Christopher] took [Anna] on the Tilt-o-Whirl. [William] went to the park with his father, [Christopher].
proof_state: [{('Anna', 'brother', 'William'): [('Anna', 'father', 'Christopher'), ('Christopher', 'son', 'William')]}]