story: [James] took his son [Dan] to school this morning because he missed the bus. [Jason] is [Dan]'s favorite grandfather.
query: ('James', 'Jason')
clean_story: [James] took his son [Dan] to school this morning because he missed the bus. [Jason] is [Dan]'s favorite grandfather.
proof_state: [{('James', 'father', 'Jason'): [('James', 'son', 'Dan'), ('Dan', 'grandfather', 'Jason')]}]