[Nicholas] has a brother who is younger than him. The brother has a sister whose name is [Lillian]. [Wayne] and his sister [Lillian] went to brunch today at the new diner.
('Nicholas', 'Wayne')
[Nicholas] has a brother who is younger than him. The brother has a sister whose name is [Lillian]. [Wayne] and his sister [Lillian] went to brunch today at the new diner.
[{('Nicholas', 'brother', 'Wayne'): [('Nicholas', 'sister', 'Lillian'), ('Lillian', 'brother', 'Wayne')]}]
['sister', 'brother']