[George]'s wife, [Lillian] was hungry, so [George] cooked her her favorite meal. [Lillian] asked her son [Douglas] to help her fix her television.
('George', 'Douglas')
[George]'s wife, [Lillian] was hungry, so [George] cooked her her favorite meal. [Lillian] asked her son [Douglas] to help her fix her television.
[{('George', 'son', 'Douglas'): [('George', 'wife', 'Lillian'), ('Lillian', 'son', 'Douglas')]}]
['wife', 'son']