story: [Mark] and his son [Jason] went to the skating rink. [Carol]'s father [Rudolph] and son [David] went to the park with [Jason]'s brother, [David].
query: ('Jason', 'Rudolph')
clean_story: [Carol]'s father [Rudolph] and son [David] went to the park with [Jason]'s brother, [David].
proof_state: [{('Jason', 'grandfather', 'Rudolph'): [('Jason', 'mother', 'Carol'), ('Carol', 'father', 'Rudolph')]}, {('Jason', 'mother', 'Carol'): [('Jason', 'brother', 'David'), ('David', 'mother', 'Carol')]}]