story: [Mark] took his son [Jason] and [Jason]'s sister [Mary] to see [Mary]'s grandmother [Sandra] because she had not seen them in several months. [Mark] bought his daughter, [Jacklyn], flowers.
query: ('Mark', 'Sandra')
clean_story: [Mark] took his son [Jason] and [Jason]'s sister [Mary] to see [Mary]'s grandmother [Sandra] because she had not seen them in several months.
proof_state: [{('Mark', 'mother', 'Sandra'): [('Mark', 'daughter', 'Mary'), ('Mary', 'grandmother', 'Sandra')]}, {('Mark', 'daughter', 'Mary'): [('Mark', 'son', 'Jason'), ('Jason', 'sister', 'Mary')]}]