[Lillian] and her brother [Dale] went to a soccer game. [Dale]'s son, [Nicolas], was playing, so they cheered him on.
('Lillian', 'Nicolas')
[Lillian] and her brother [Dale] went to a soccer game. [Dale]'s son, [Nicolas], was playing, so they cheered him on.
[{('Lillian', 'nephew', 'Nicolas'): [('Lillian', 'brother', 'Dale'), ('Dale', 'son', 'Nicolas')]}]
['brother', 'son']