story: [Richard] and his brother [David] went to the arcade. They had a wonderful time. [Mark] told his son [Jason] that his other son [David] was picking up his mother [Carol] at the airport.
query: ('Jason', 'Carol')
clean_story: [Mark] told his son [Jason] that his other son [David] was picking up his mother [Carol] at the airport.
proof_state: [{('Jason', 'mother', 'Carol'): [('Jason', 'brother', 'David'), ('David', 'mother', 'Carol')]}, {('Jason', 'brother', 'David'): [('Jason', 'father', 'Mark'), ('Mark', 'son', 'David')]}]