[Nicholas] has a son named [Milton] that looks exactly like him. [Milton] and his sister [Natalia] went to brunch today at the new diner.
('Natalia', 'Nicholas')
[Milton] and his sister [Natalia] went to brunch today at the new diner. [Nicholas] has a son named [Milton] that looks exactly like him.
[{('Natalia', 'father', 'Nicholas'): [('Natalia', 'brother', 'Milton'), ('Milton', 'father', 'Nicholas')]}]
['brother', 'father']