story: [Valerie] and her sister [Marian] braided each other's hair before school. [Sandra] invited her sisters, [Marian] and [Michelle], to a party.
query: ('Michelle', 'Valerie')
clean_story: [Sandra] invited her sisters, [Marian] and [Michelle], to a party. [Valerie] and her sister [Marian] braided each other's hair before school.
proof_state: [{('Michelle', 'sister', 'Valerie'): [('Michelle', 'sister', 'Sandra'), ('Sandra', 'sister', 'Valerie')]}, {('Sandra', 'sister', 'Valerie'): [('Sandra', 'sister', 'Marian'), ('Marian', 'sister', 'Valerie')]}]