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