story: [Dwight] 'son [David] could not believe that his father bought him a coffee machine for his birthday. [Dwight] hit his brother [Christopher] in the head.
query: ('Christopher', 'David')
clean_story: [Dwight] hit his brother [Christopher] in the head. [Dwight] 'son [David] could not believe that his father bought him a coffee machine for his birthday.
proof_state: [{('Christopher', 'nephew', 'David'): [('Christopher', 'brother', 'Dwight'), ('Dwight', 'son', 'David')]}]