[Glen] got coffee for his wife [Natalia] and his father [Nicholas].
('Natalia', 'Nicholas')
[Glen] got coffee for his wife [Natalia] and his father [Nicholas].
[{('Natalia', 'father-in-law', 'Nicholas'): [('Natalia', 'husband', 'Glen'), ('Glen', 'father', 'Nicholas')]}]
['husband', 'father']