story: [Alma] took her son [Robert] to school and his grandfather [Jason] picked him up at then end of the school day.
query: ('Alma', 'Jason')
clean_story: [Alma] took her son [Robert] to school and his grandfather [Jason] picked him up at then end of the school day.
proof_state: [{('Alma', 'father', 'Jason'): [('Alma', 'son', 'Robert'), ('Robert', 'grandfather', 'Jason')]}]