story: [Danita] was celebrating her birthday with her mother [Lisa]. [Danita] invited her father [Peter] to her high school father daughter dance. [Stacy] is Grandson of [Sandra] and brother of [Danita]
query: ('Peter', 'Sandra')
clean_story: [Danita] invited her father [Peter] to her high school father daughter dance. [Stacy] is Grandson of [Sandra] and brother of [Danita]
proof_state: [{('Peter', 'mother', 'Sandra'): [('Peter', 'daughter', 'Danita'), ('Danita', 'grandmother', 'Sandra')]}, {('Danita', 'grandmother', 'Sandra'): [('Danita', 'brother', 'Stacy'), ('Stacy', 'grandmother', 'Sandra')]}]