story: [Scott] and his brother [David] are going to visit [David]'s grandfather [Jason] at the hospital.
query: ('Scott', 'Jason')
clean_story: [Scott] and his brother [David] are going to visit [David]'s grandfather [Jason] at the hospital.
proof_state: [{('Scott', 'grandfather', 'Jason'): [('Scott', 'brother', 'David'), ('David', 'grandfather', 'Jason')]}]