story: [Jaime]'s father [Preston] and grandfather [Adam] went to the park to play chess. [Brian] loves to play baseball with his dad, [Preston].
query: ('Preston', 'Adam')
clean_story: [Jaime]'s father [Preston] and grandfather [Adam] went to the park to play chess.
proof_state: [{('Preston', 'father', 'Adam'): [('Preston', 'son', 'Jaime'), ('Jaime', 'grandfather', 'Adam')]}]