[Milton] was excited to go v isit his mom [Amy]. His wife [Mary] was n't as happy.
('Amy', 'Mary')
[Milton] was excited to go v isit his mom [Amy]. His wife [Mary] was n't as happy.
[{('Amy', 'daughter-in-law', 'Mary'): [('Amy', 'son', 'Milton'), ('Milton', 'wife', 'Mary')]}]
['son', 'wife']