story: [Errol] is a man with a son named [James]. [Rose] and her husband [James] arrived late to the fundraising gala. [James] had to watch his son, [Casey], because the babysitter did n't show up. [Mark] offered to babysit as a favor to [Rose], his sister.
query: ('Mark', 'Casey')
clean_story: [Rose] and her husband [James] arrived late to the fundraising gala. [James] had to watch his son, [Casey], because the babysitter did n't show up. [Mark] offered to babysit as a favor to [Rose], his sister.
proof_state: [{('Mark', 'nephew', 'Casey'): [('Mark', 'sister', 'Rose'), ('Rose', 'son', 'Casey')]}, {('Rose', 'son', 'Casey'): [('Rose', 'husband', 'James'), ('James', 'son', 'Casey')]}]