story: [Dorothy] called [Lisa], her sister, to see if she wanted to go out to eat. [Lisa] called [Myrna], her sister, to see if she wanted to go out to eat.
query: ('Myrna', 'Dorothy')
clean_story: [Lisa] called [Myrna], her sister, to see if she wanted to go out to eat. [Dorothy] called [Lisa], her sister, to see if she wanted to go out to eat.
proof_state: [{('Myrna', 'sister', 'Dorothy'): [('Myrna', 'sister', 'Lisa'), ('Lisa', 'sister', 'Dorothy')]}]