[Lillian] picked up her son [Jerry] from tennis practice and then met up with her husband [George] for dinner.
('George', 'Jerry')
[Lillian] picked up her son [Jerry] from tennis practice and then met up with her husband [George] for dinner.
[{('George', 'son', 'Jerry'): [('George', 'wife', 'Lillian'), ('Lillian', 'son', 'Jerry')]}]
['wife', 'son']