[Nicholas] met his brother [Wayne] for drinks after work. [Wayne]'s son [Jeff] entered rehab for the ninth time at the age of thirty.
('Nicholas', 'Jeff')
[Nicholas] met his brother [Wayne] for drinks after work. [Wayne]'s son [Jeff] entered rehab for the ninth time at the age of thirty.
[{('Nicholas', 'nephew', 'Jeff'): [('Nicholas', 'brother', 'Wayne'), ('Wayne', 'son', 'Jeff')]}]
['brother', 'son']