[Nancy] and her brother [Nicholas] went to the department store. [Glen], [Nicholas]'s son, came with them.
('Nancy', 'Glen')
[Nancy] and her brother [Nicholas] went to the department store. [Glen], [Nicholas]'s son, came with them.
[{('Nancy', 'nephew', 'Glen'): [('Nancy', 'brother', 'Nicholas'), ('Nicholas', 'son', 'Glen')]}]
['brother', 'son']