story: [Crystal] went shopping with her son [Bernard] and her brother [Paul]. [Mary] was excited for today, its her daughter's, [Crystal], spring break. She will finally get to see her.
query: ('Paul', 'Bernard')
clean_story: [Crystal] went shopping with her son [Bernard] and her brother [Paul].
proof_state: [{('Paul', 'nephew', 'Bernard'): [('Paul', 'sister', 'Crystal'), ('Crystal', 'son', 'Bernard')]}]