story: [Crystal] has a son called [Mark]. Each day they go to the park after school. [Crystal] and her daughter [Rosemary] went out for ice cream. [Crystal] got a cone and [Rosemary] got a sundae. [Bernard] and his brother [Mark] went to the park. They threw a ball around and played with their dog.
query: ('Crystal', 'Bernard')
clean_story: [Crystal] has a son called [Mark]. Each day they go to the park after school. [Bernard] and his brother [Mark] went to the park. They threw a ball around and played with their dog.
proof_state: [{('Crystal', 'son', 'Bernard'): [('Crystal', 'son', 'Mark'), ('Mark', 'brother', 'Bernard')]}]