story: [Mark] went on vacation with his wife, [Carol], and his son, [David]. They were going to visit [Sandra], [David]'s grandmother, and the boy was very excited to get the chance to see her. [David] and his brother [Richard] went to the football game together.
query: ('Carol', 'Sandra')
clean_story: [Mark] went on vacation with his wife, [Carol], and his son, [David]. They were going to visit [Sandra], [David]'s grandmother, and the boy was very excited to get the chance to see her.
proof_state: [{('Carol', 'mother', 'Sandra'): [('Carol', 'son', 'David'), ('David', 'grandmother', 'Sandra')]}, {('Carol', 'son', 'David'): [('Carol', 'husband', 'Mark'), ('Mark', 'son', 'David')]}]