story: [William] loved his mother, [Myrna]. [Dorothy] and her nephew [William] played the piano together.
query: ('Myrna', 'Dorothy')
clean_story: [William] loved his mother, [Myrna]. [Dorothy] and her nephew [William] played the piano together.
proof_state: [{('Myrna', 'sister', 'Dorothy'): [('Myrna', 'son', 'William'), ('William', 'aunt', 'Dorothy')]}]