[Glen] and his wife [Natalia], were n't getting along. [Natalia]'s father, [Nicholas], offered to act as a mediator.
('Glen', 'Nicholas')
[Glen] and his wife [Natalia], were n't getting along. [Natalia]'s father, [Nicholas], offered to act as a mediator.
[{('Glen', 'father-in-law', 'Nicholas'): [('Glen', 'wife', 'Natalia'), ('Natalia', 'father', 'Nicholas')]}]
['wife', 'father']