[Nicholas] loved teaching his son, [Dennis], baseball. [George] has a sibling who is much younger than he is. They get along well and his name is [Nicholas].
('George', 'Dennis')
[George] has a sibling who is much younger than he is. They get along well and his name is [Nicholas]. [Nicholas] loved teaching his son, [Dennis], baseball.
[{('George', 'nephew', 'Dennis'): [('George', 'brother', 'Nicholas'), ('Nicholas', 'son', 'Dennis')]}]
['brother', 'son']