story: [Fletcher] took his sisters [Dulce] and [Sabrina] on a hiking trip last weekend. [Nancy] took her daughter [Sabrina] to the store to find her some new boots for the cold winter weather.
query: ('Sabrina', 'Dulce')
clean_story: [Fletcher] took his sisters [Dulce] and [Sabrina] on a hiking trip last weekend.
proof_state: [{('Sabrina', 'sister', 'Dulce'): [('Sabrina', 'brother', 'Fletcher'), ('Fletcher', 'sister', 'Dulce')]}]