story: [Valerie] and his son [Jason] are currently visiting [Jason]'s grandfather [Stanley] and [Stanley]'s son [Elliott].
query: ('Valerie', 'Elliott')
clean_story: [Valerie] and his son [Jason] are currently visiting [Jason]'s grandfather [Stanley] and [Stanley]'s son [Elliott].
proof_state: [{('Valerie', 'brother', 'Elliott'): [('Valerie', 'father', 'Stanley'), ('Stanley', 'son', 'Elliott')]}, {('Valerie', 'father', 'Stanley'): [('Valerie', 'son', 'Jason'), ('Jason', 'grandfather', 'Stanley')]}]