[Amy] went to the basketball game with her brother [Dale], who brought along his son [Tony].
('Amy', 'Tony')
[Amy] went to the basketball game with her brother [Dale], who brought along his son [Tony].
[{('Amy', 'nephew', 'Tony'): [('Amy', 'brother', 'Dale'), ('Dale', 'son', 'Tony')]}]
['brother', 'son']