story: [Lisa] and her brother [James] watched TV together. [Christopher] was invited to watch too, because [Lisa] is his sister.
query: ('Christopher', 'James')
clean_story: [Lisa] and her brother [James] watched TV together. [Christopher] was invited to watch too, because [Lisa] is his sister.
proof_state: [{('Christopher', 'brother', 'James'): [('Christopher', 'sister', 'Lisa'), ('Lisa', 'brother', 'James')]}]