story: [Nancy]'s brother, [Preston], was getting ready to start a new job. [Nancy] was very happy for him. [Otto] was playing football with his brother, [Paul]. [Otto]'s brother, [Preston], had a broken leg and could only watch.
query: ('Preston', 'Paul')
clean_story: [Otto] was playing football with his brother, [Paul]. [Otto]'s brother, [Preston], had a broken leg and could only watch.
proof_state: [{('Preston', 'brother', 'Paul'): [('Preston', 'brother', 'Otto'), ('Otto', 'brother', 'Paul')]}]