story: [Robert] and his grandfather [Adam] are going mountain climbing. [Robert]'s brother [Leo] is too afraid of heights to tag along. [Robert] went to the park with his father, [Paul].
query: ('Leo', 'Adam')
clean_story: [Robert] and his grandfather [Adam] are going mountain climbing. [Robert]'s brother [Leo] is too afraid of heights to tag along.
proof_state: [{('Leo', 'grandfather', 'Adam'): [('Leo', 'brother', 'Robert'), ('Robert', 'grandfather', 'Adam')]}]