[Jacob] could n't wait to introduce his new son to his uncle, [Nicholas]. [Nancy] talks to her son [Jacob] every day.
('Nancy', 'Nicholas')
[Nancy] talks to her son [Jacob] every day. [Jacob] could n't wait to introduce his new son to his uncle, [Nicholas].
[{('Nancy', 'brother', 'Nicholas'): [('Nancy', 'son', 'Jacob'), ('Jacob', 'uncle', 'Nicholas')]}]
['son', 'uncle']