story: [Christopher] took his daughter [Lucille] to see her grandfather [Jason] after school yesterday.
query: ('Christopher', 'Jason')
clean_story: [Christopher] took his daughter [Lucille] to see her grandfather [Jason] after school yesterday.
proof_state: [{('Christopher', 'father', 'Jason'): [('Christopher', 'daughter', 'Lucille'), ('Lucille', 'grandfather', 'Jason')]}]