[Nancy] is a woman with a nephew named [Dennis]. [Nicholas] is so proud of his son. [Dennis] is the son's name.
('Nicholas', 'Nancy')
[Nicholas] is so proud of his son. [Dennis] is the son's name. [Nancy] is a woman with a nephew named [Dennis].
[{('Nicholas', 'sister', 'Nancy'): [('Nicholas', 'son', 'Dennis'), ('Dennis', 'aunt', 'Nancy')]}]
['son', 'aunt']