[Nicholas] is taking his son [Dennis] out for coffee. [George] and his brother [Nicholas] are constantly trying to one up each other.
('George', 'Dennis')
[George] and his brother [Nicholas] are constantly trying to one up each other. [Nicholas] is taking his son [Dennis] out for coffee.
[{('George', 'nephew', 'Dennis'): [('George', 'brother', 'Nicholas'), ('Nicholas', 'son', 'Dennis')]}]
['brother', 'son']