story: [Mark] and his wife [Carol] went to a lovely anniversary dinner. [Jason] went to the store with his brother, [David]. [Jason] and his son [Mark] are going to eat lunch with [Sandra], [Jason]'s grandmother.
query: ('Carol', 'Sandra')
clean_story: [Mark] and his wife [Carol] went to a lovely anniversary dinner. [Jason] and his son [Mark] are going to eat lunch with [Sandra], [Jason]'s grandmother.
proof_state: [{('Carol', 'mother', 'Sandra'): [('Carol', 'son', 'Jason'), ('Jason', 'grandmother', 'Sandra')]}, {('Carol', 'son', 'Jason'): [('Carol', 'husband', 'Mark'), ('Mark', 'son', 'Jason')]}]