story: [William] was going out to dinner with his sister [Anna] when he received a call from his grandfather [Jason].
query: ('Anna', 'Jason')
clean_story: [William] was going out to dinner with his sister [Anna] when he received a call from his grandfather [Jason].
proof_state: [{('Anna', 'grandfather', 'Jason'): [('Anna', 'brother', 'William'), ('William', 'grandfather', 'Jason')]}]