[Brent] took his wife [Margaret] to Hawaii. [Brent]'s dad [John] was worried because he had no idea where they were.
('John', 'Margaret')
[Brent] took his wife [Margaret] to Hawaii. [Brent]'s dad [John] was worried because he had no idea where they were.
[{('John', 'daughter-in-law', 'Margaret'): [('John', 'son', 'Brent'), ('Brent', 'wife', 'Margaret')]}]