story: [Dwight] made a grilled cheese for his son [Lewis]. [Lewis]'s brother [David] ate a salad.
query: ('Dwight', 'David')
clean_story: [Dwight] made a grilled cheese for his son [Lewis]. [Lewis]'s brother [David] ate a salad.
proof_state: [{('Dwight', 'son', 'David'): [('Dwight', 'son', 'Lewis'), ('Lewis', 'brother', 'David')]}]