story: [Michelle] and her sister [Sandra] braided each other's hair before school. [Marian] asked her brother [Alan] if he wanted to go to the skating rink. [Alan] saw his younger sister [Michelle] crying because she wanted to skate too, but could n't with her broken leg.
query: ('Sandra', 'Marian')
clean_story: [Michelle] and her sister [Sandra] braided each other's hair before school. [Marian] asked her brother [Alan] if he wanted to go to the skating rink. [Alan] saw his younger sister [Michelle] crying because she wanted to skate too, but could n't with her broken leg.
proof_state: [{('Sandra', 'sister', 'Marian'): [('Sandra', 'brother', 'Alan'), ('Alan', 'sister', 'Marian')]}, {('Sandra', 'brother', 'Alan'): [('Sandra', 'sister', 'Michelle'), ('Michelle', 'brother', 'Alan')]}]