story: [Christopher] took his sisters [Lisa] and [Alma] on a hiking trip last weekend.
query: ('Alma', 'Lisa')
clean_story: [Christopher] took his sisters [Lisa] and [Alma] on a hiking trip last weekend.
proof_state: [{('Alma', 'sister', 'Lisa'): [('Alma', 'brother', 'Christopher'), ('Christopher', 'sister', 'Lisa')]}]