story: [Christopher] and his sister [Alma] threw a surprise pizza party for [Christopher]'s son, [Jeffrey].
query: ('Jeffrey', 'Alma')
clean_story: [Christopher] and his sister [Alma] threw a surprise pizza party for [Christopher]'s son, [Jeffrey].
proof_state: [{('Jeffrey', 'aunt', 'Alma'): [('Jeffrey', 'father', 'Christopher'), ('Christopher', 'sister', 'Alma')]}]