story: [Paul] braided his sister [Melissa]'s hair. [Crystal]'s son [Bernard] and brother [Paul] came to her birthday party last weekend.
query: ('Paul', 'Bernard')
clean_story: [Crystal]'s son [Bernard] and brother [Paul] came to her birthday party last weekend.
proof_state: [{('Paul', 'nephew', 'Bernard'): [('Paul', 'sister', 'Crystal'), ('Crystal', 'son', 'Bernard')]}]