[George] enjoys the company of his sibling [Nancy]. [Nancy] read her son [Robert] a bedtime story every night.
('George', 'Robert')
[George] enjoys the company of his sibling [Nancy]. [Nancy] read her son [Robert] a bedtime story every night.
[{('George', 'nephew', 'Robert'): [('George', 'sister', 'Nancy'), ('Nancy', 'son', 'Robert')]}]
['sister', 'son']