story: [Melissa] took her father [Adam] out to dinner one day and also brought along her son [Brian]. [Brian] liked to play games with his sister, [Stacy].
query: ('Brian', 'Adam')
clean_story: [Melissa] took her father [Adam] out to dinner one day and also brought along her son [Brian].
proof_state: [{('Brian', 'grandfather', 'Adam'): [('Brian', 'mother', 'Melissa'), ('Melissa', 'father', 'Adam')]}]