story: [John] and his brother [Dana] fight a lot. Despite this, they still love each other very much. [Otto] called his brother [Preston] and invited him to his son [Dana]'s football game.
query: ('Dana', 'Preston')
clean_story: [Otto] called his brother [Preston] and invited him to his son [Dana]'s football game.
proof_state: [{('Dana', 'uncle', 'Preston'): [('Dana', 'father', 'Otto'), ('Otto', 'brother', 'Preston')]}]