story: [Stacy] was angry at his father, [Peter], for grounding him. [Eustolia] saw how angry her brother, [Stacy], was and tried to calm him down. [James] hit his brother [Peter] in the head. [Sandra], [Peter] mother, likes to take him to eat ice cream on Sundays.
query: ('Eustolia', 'Sandra')
clean_story: [Stacy] was angry at his father, [Peter], for grounding him. [Eustolia] saw how angry her brother, [Stacy], was and tried to calm him down. [Sandra], [Peter] mother, likes to take him to eat ice cream on Sundays.
proof_state: [{('Eustolia', 'grandmother', 'Sandra'): [('Eustolia', 'father', 'Peter'), ('Peter', 'mother', 'Sandra')]}, {('Eustolia', 'father', 'Peter'): [('Eustolia', 'brother', 'Stacy'), ('Stacy', 'father', 'Peter')]}]