story: [Stacy] loves his mother very much. Her name is [Lisa]. [Erik] asked his sister, [Eustolia], if she could drop him and his brother [Stacy] off at the library. She said no because [Stacy] 'dad, [Peter], had just finished making dinner.
query: ('Peter', 'Eustolia')
clean_story: [Erik] asked his sister, [Eustolia], if she could drop him and his brother [Stacy] off at the library. She said no because [Stacy] 'dad, [Peter], had just finished making dinner.
proof_state: [{('Peter', 'daughter', 'Eustolia'): [('Peter', 'son', 'Stacy'), ('Stacy', 'sister', 'Eustolia')]}, {('Stacy', 'sister', 'Eustolia'): [('Stacy', 'brother', 'Erik'), ('Erik', 'sister', 'Eustolia')]}]