story: [Elliott] decided to give his son [Sidney], for his birthday, the latest version of Apple watch. [Elliott] 'son [Mark] and [Mark]'s grandfather [Stanley] went on a cruise together.
query: ('Sidney', 'Stanley')
clean_story: [Elliott] decided to give his son [Sidney], for his birthday, the latest version of Apple watch. [Elliott] 'son [Mark] and [Mark]'s grandfather [Stanley] went on a cruise together.
proof_state: [{('Sidney', 'grandfather', 'Stanley'): [('Sidney', 'father', 'Elliott'), ('Elliott', 'father', 'Stanley')]}, {('Elliott', 'father', 'Stanley'): [('Elliott', 'son', 'Mark'), ('Mark', 'grandfather', 'Stanley')]}]