[Nicholas] made popcorn for his daughter [Natalia]. [Natalia]'s husband [Glen] is allergic to popcorn.
('Glen', 'Nicholas')
[Nicholas] made popcorn for his daughter [Natalia]. [Natalia]'s husband [Glen] is allergic to popcorn.
[{('Glen', 'father-in-law', 'Nicholas'): [('Glen', 'wife', 'Natalia'), ('Natalia', 'father', 'Nicholas')]}]
['wife', 'father']