story: [Adam] and his daughter [Crystal] went to Disney World together. [Otto] and his son, [Dana], helped his father [Adam] with house chores.
query: ('Adam', 'Dana')
clean_story: [Otto] and his son, [Dana], helped his father [Adam] with house chores.
proof_state: [{('Adam', 'grandson', 'Dana'): [('Adam', 'son', 'Otto'), ('Otto', 'son', 'Dana')]}]