story: [Dorothy] went shopping with her son [Micheal] and her brother [Christopher].
query: ('Christopher', 'Micheal')
clean_story: [Dorothy] went shopping with her son [Micheal] and her brother [Christopher].
proof_state: [{('Christopher', 'nephew', 'Micheal'): [('Christopher', 'sister', 'Dorothy'), ('Dorothy', 'son', 'Micheal')]}]