[Michael] is a son of the proud [Nicholas]. [Clarence] is [Michael]'s proud grandfather
('Nicholas', 'Clarence')
[Michael] is a son of the proud [Nicholas]. [Clarence] is [Michael]'s proud grandfather
[{('Nicholas', 'father', 'Clarence'): [('Nicholas', 'son', 'Michael'), ('Michael', 'grandfather', 'Clarence')]}]
['son', 'grandfather']