[Lillian] does n't like her brother [Nicholas]. [Milton] went to the park with his father, [Nicholas].
('Lillian', 'Milton')
[Lillian] does n't like her brother [Nicholas]. [Milton] went to the park with his father, [Nicholas].
[{('Lillian', 'nephew', 'Milton'): [('Lillian', 'brother', 'Nicholas'), ('Nicholas', 'son', 'Milton')]}]
['brother', 'son']