story: [Aida] ca n't wait to see her grandfather [Jason]. [Vincent]'s sister, [Aida], bought movie tickets at a discount rate.
query: ('Vincent', 'Jason')
clean_story: [Vincent]'s sister, [Aida], bought movie tickets at a discount rate. [Aida] ca n't wait to see her grandfather [Jason].
proof_state: [{('Vincent', 'grandfather', 'Jason'): [('Vincent', 'sister', 'Aida'), ('Aida', 'grandfather', 'Jason')]}]