story: [Dwight] went to the store with his brother, [Christopher]. [William] is a man with a son named [Christopher].
query: ('Dwight', 'William')
clean_story: [Dwight] went to the store with his brother, [Christopher]. [William] is a man with a son named [Christopher].
proof_state: [{('Dwight', 'nephew', 'William'): [('Dwight', 'brother', 'Christopher'), ('Christopher', 'son', 'William')]}]