story: [Preston] was sad to learn that his sister [Nancy] was not going to make it to dinner like they had planned. [Stacy] needed to ask her father [Preston] for a loan. [Preston] and his sister [Crystal] walked to school together every day, since they only lived two blocks away from the school.
query: ('Stacy', 'Crystal')
clean_story: [Stacy] needed to ask her father [Preston] for a loan. [Preston] and his sister [Crystal] walked to school together every day, since they only lived two blocks away from the school.
proof_state: [{('Stacy', 'aunt', 'Crystal'): [('Stacy', 'father', 'Preston'), ('Preston', 'sister', 'Crystal')]}]