story: [Nancy]'s brother [James] was going to be the star in the new show. [Preston] went to pick up his son [Brian] from the baseball practice. [Nancy]'s brother [Preston] was going to be the star in the new show.
query: ('Nancy', 'Brian')
clean_story: [Nancy]'s brother [Preston] was going to be the star in the new show. [Preston] went to pick up his son [Brian] from the baseball practice.
proof_state: [{('Nancy', 'nephew', 'Brian'): [('Nancy', 'brother', 'Preston'), ('Preston', 'son', 'Brian')]}]