story: [Mark]'s wife [Carol] made a lovely dinner for his son [Richard] and [Richard]'s grandmother, [Sandra]. [Mark] was proud of his son, [Michael].
query: ('Carol', 'Sandra')
clean_story: [Mark]'s wife [Carol] made a lovely dinner for his son [Richard] and [Richard]'s grandmother, [Sandra].
proof_state: [{('Carol', 'mother-in-law', 'Sandra'): [('Carol', 'husband', 'Mark'), ('Mark', 'mother', 'Sandra')]}, {('Mark', 'mother', 'Sandra'): [('Mark', 'son', 'Richard'), ('Richard', 'grandmother', 'Sandra')]}]