story: [James] and his brother [Peter] went out for lunch. [James] had a burger, and [Peter] had a chicken sandwich. [Mark] was crying at his brother [James]'s funeral. His son, [Michael], was there to comfort him. [Sandra] loves playing chess her son. His name is [James].
query: ('Michael', 'Sandra')
clean_story: [Mark] was crying at his brother [James]'s funeral. His son, [Michael], was there to comfort him. [Sandra] loves playing chess her son. His name is [James].
proof_state: [{('Michael', 'grandmother', 'Sandra'): [('Michael', 'father', 'Mark'), ('Mark', 'mother', 'Sandra')]}, {('Mark', 'mother', 'Sandra'): [('Mark', 'brother', 'James'), ('James', 'mother', 'Sandra')]}]