story: [Mary] adores her daughter [Crystal]. [Crystal] loves her very much, too. [Paul] wanted to go to the park with his sister [Crystal]. [Crystal] said she'd rather go swimming with her sister [Melissa] instead.
query: ('Paul', 'Melissa')
clean_story: [Paul] wanted to go to the park with his sister [Crystal]. [Crystal] said she'd rather go swimming with her sister [Melissa] instead.
proof_state: [{('Paul', 'sister', 'Melissa'): [('Paul', 'sister', 'Crystal'), ('Crystal', 'sister', 'Melissa')]}]