[Nicholas] has a son named [Dennis] that looks exactly like him. [Nicholas] and his sister [Lillian] went to the ice skating rink. [Nicholas] fell down and [Lillian] laughed at him.
('Dennis', 'Lillian')
[Nicholas] has a son named [Dennis] that looks exactly like him. [Nicholas] and his sister [Lillian] went to the ice skating rink. [Nicholas] fell down and [Lillian] laughed at him.
[{('Dennis', 'aunt', 'Lillian'): [('Dennis', 'father', 'Nicholas'), ('Nicholas', 'sister', 'Lillian')]}]
['father', 'sister']