[George]'s son [Timothy] is in the hospital. [Timothy]'s brother [Jerry] accidentally hit him with a hammer.
('George', 'Jerry')
[George]'s son [Timothy] is in the hospital. [Timothy]'s brother [Jerry] accidentally hit him with a hammer.
[{('George', 'son', 'Jerry'): [('George', 'son', 'Timothy'), ('Timothy', 'brother', 'Jerry')]}]
['son', 'brother']