story: [Brian] is son of [Melissa]. [Brian] and his sister [Stacy] love to play video games. [Crystal] and her sister [Melissa] have never been close. Still, they love each other because they are family.
query: ('Brian', 'Crystal')
clean_story: [Brian] is son of [Melissa]. [Crystal] and her sister [Melissa] have never been close. Still, they love each other because they are family.
proof_state: [{('Brian', 'aunt', 'Crystal'): [('Brian', 'mother', 'Melissa'), ('Melissa', 'sister', 'Crystal')]}]