[Amy]'s son, [Glen], was busy with school activities and forgot to meet his sister. [Nicholas] has been married for over 10 years now. He has a lovely wife named [Amy].
('Nicholas', 'Glen')
[Nicholas] has been married for over 10 years now. He has a lovely wife named [Amy]. [Amy]'s son, [Glen], was busy with school activities and forgot to meet his sister.
[{('Nicholas', 'son', 'Glen'): [('Nicholas', 'wife', 'Amy'), ('Amy', 'son', 'Glen')]}]
['wife', 'son']