story: [Tammy] was talking about food with her sister [Rebbeca]. [John] called his brother, [Dana], to confirm when [Dana]'s sister, [Tammy], was coming to the dinner.
query: ('Tammy', 'John')
clean_story: [John] called his brother, [Dana], to confirm when [Dana]'s sister, [Tammy], was coming to the dinner.
proof_state: [{('Tammy', 'brother', 'John'): [('Tammy', 'brother', 'Dana'), ('Dana', 'brother', 'John')]}]