[Nicholas] asked his father [Clarence] if he could borrow some money. [Nicholas] is a man with a son named [Dennis].
('Dennis', 'Clarence')
[Nicholas] is a man with a son named [Dennis]. [Nicholas] asked his father [Clarence] if he could borrow some money.
[{('Dennis', 'grandfather', 'Clarence'): [('Dennis', 'father', 'Nicholas'), ('Nicholas', 'father', 'Clarence')]}]
['father', 'father']