story: [Minnie] took her sister [Crystal] out for dinner to celebrate her birthday. [David] went to the grocery store for his brother [Bernard], because he broke his leg. [Crystal] has an amazing son. Her son [Bernard] is very talented.
query: ('Bernard', 'Minnie')
clean_story: [Crystal] has an amazing son. Her son [Bernard] is very talented. [Minnie] took her sister [Crystal] out for dinner to celebrate her birthday.
proof_state: [{('Bernard', 'aunt', 'Minnie'): [('Bernard', 'mother', 'Crystal'), ('Crystal', 'sister', 'Minnie')]}]