[Nicholas]'s wife, [Amy], took her son, [Glen], to the movies.
('Nicholas', 'Glen')
[Nicholas]'s wife, [Amy], took her son, [Glen], to the movies.
[{('Nicholas', 'son', 'Glen'): [('Nicholas', 'wife', 'Amy'), ('Amy', 'son', 'Glen')]}]
['wife', 'son']