[George] does not know he has a son named [Jerry]. [Amy] took her nephew [Jerry] to the park to play soccer.
('George', 'Amy')
[George] does not know he has a son named [Jerry]. [Amy] took her nephew [Jerry] to the park to play soccer.
[{('George', 'sister', 'Amy'): [('George', 'son', 'Jerry'), ('Jerry', 'aunt', 'Amy')]}]
['son', 'aunt']