[Lillian] takes her son [Jerry] to the park every Saturday. [Jerry] has been married to [Janet] for ten years today.
('Lillian', 'Janet')
[Lillian] takes her son [Jerry] to the park every Saturday. [Jerry] has been married to [Janet] for ten years today.
[{('Lillian', 'daughter-in-law', 'Janet'): [('Lillian', 'son', 'Jerry'), ('Jerry', 'wife', 'Janet')]}]
['son', 'wife']