story: [Kevin]'s brother, [Dan], brought the car over to help him. [Jason] is [Dan]'s grandfather. [Dan] likes to go fishing with his grandfather.
query: ('Kevin', 'Jason')
clean_story: [Kevin]'s brother, [Dan], brought the car over to help him. [Jason] is [Dan]'s grandfather. [Dan] likes to go fishing with his grandfather.
proof_state: [{('Kevin', 'grandfather', 'Jason'): [('Kevin', 'brother', 'Dan'), ('Dan', 'grandfather', 'Jason')]}]