story: [Paul] and his brother [Preston] were playing tag in the park. [Preston] and his daughter [Stacy] are planning a trip to the mountains. They have n't been in almost 10 years. [Preston] took his son [Brian] for boxing lessons. He felt the boy needed to toughen up.
query: ('Paul', 'Brian')
clean_story: [Paul] and his brother [Preston] were playing tag in the park. [Preston] took his son [Brian] for boxing lessons. He felt the boy needed to toughen up.
proof_state: [{('Paul', 'nephew', 'Brian'): [('Paul', 'brother', 'Preston'), ('Preston', 'son', 'Brian')]}]