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