[Nicholas] has a son named [Michael] that looks exactly like him. [Clarence] is taking his son [Nicholas] on a camping trip for the weekend.
('Michael', 'Clarence')
[Nicholas] has a son named [Michael] that looks exactly like him. [Clarence] is taking his son [Nicholas] on a camping trip for the weekend.
[{('Michael', 'grandfather', 'Clarence'): [('Michael', 'father', 'Nicholas'), ('Nicholas', 'father', 'Clarence')]}]
['father', 'father']