story: [Crystal] went to the museum with her son [David] and her father [Adam]. [David] went to the wedding ceremony for his brother [Bernard].
query: ('David', 'Adam')
clean_story: [Crystal] went to the museum with her son [David] and her father [Adam].
proof_state: [{('David', 'grandfather', 'Adam'): [('David', 'mother', 'Crystal'), ('Crystal', 'father', 'Adam')]}]