story: [Mary] and her father [Mark] went for a hike in the mountains. [Jason] went to the wedding ceremony for his brother [Michael]. [Jason]'s father's name is [Mark]. [Sandra] bought her grandson [Jason] a video game that he had been wanting and he thanked her with a big hug.
query: ('Mary', 'Sandra')
clean_story: [Mary] and her father [Mark] went for a hike in the mountains. [Jason]'s father's name is [Mark]. [Sandra] bought her grandson [Jason] a video game that he had been wanting and he thanked her with a big hug.
proof_state: [{('Mary', 'grandmother', 'Sandra'): [('Mary', 'brother', 'Jason'), ('Jason', 'grandmother', 'Sandra')]}, {('Mary', 'brother', 'Jason'): [('Mary', 'father', 'Mark'), ('Mark', 'son', 'Jason')]}]