story: [Jason] went bike riding his grandson [Kevin]. [Kevin]'s father [James] was skateboarding.
query: ('James', 'Jason')
clean_story: [Jason] went bike riding his grandson [Kevin]. [Kevin]'s father [James] was skateboarding.
proof_state: [{('James', 'father', 'Jason'): [('James', 'son', 'Kevin'), ('Kevin', 'grandfather', 'Jason')]}]