[Amy] took her nephew [Jerry] to the park to play soccer. [George] went to the baseball game with his son [Jerry]
('George', 'Amy')
[George] went to the baseball game with his son [Jerry] [Amy] took her nephew [Jerry] to the park to play soccer.
[{('George', 'sister', 'Amy'): [('George', 'son', 'Jerry'), ('Jerry', 'aunt', 'Amy')]}]
['son', 'aunt']