story: [Alan] and his sister [Sandra] were looking through old family photos. [Alan]'s son [Clarence] and his brother [Carlos] were playing a game of cards near by.
query: ('Carlos', 'Sandra')
clean_story: [Alan] and his sister [Sandra] were looking through old family photos. [Alan]'s son [Clarence] and his brother [Carlos] were playing a game of cards near by.
proof_state: [{('Carlos', 'aunt', 'Sandra'): [('Carlos', 'father', 'Alan'), ('Alan', 'sister', 'Sandra')]}, {('Carlos', 'father', 'Alan'): [('Carlos', 'brother', 'Clarence'), ('Clarence', 'father', 'Alan')]}]