story: [Anna] met her dad, [Christopher], for the first time when he returned from deployment. [William] and his sister [Anna] went to the ice skating rink. [William] fell down and [Anna] laughed at him.
query: ('William', 'Christopher')
clean_story: [William] and his sister [Anna] went to the ice skating rink. [William] fell down and [Anna] laughed at him. [Anna] met her dad, [Christopher], for the first time when he returned from deployment.
proof_state: [{('William', 'father', 'Christopher'): [('William', 'sister', 'Anna'), ('Anna', 'father', 'Christopher')]}]