story: [Preston]'s son is [Edward]. [Edward] and his father always go fishing together on Sundays and have a great time together. [Preston]'s sister [Nancy] wanted [Preston]'s daughter, [Kerri], to go with them to the theatre.
query: ('Nancy', 'Kerri')
clean_story: [Preston]'s sister [Nancy] wanted [Preston]'s daughter, [Kerri], to go with them to the theatre.
proof_state: [{('Nancy', 'niece', 'Kerri'): [('Nancy', 'brother', 'Preston'), ('Preston', 'daughter', 'Kerri')]}]