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