[Amy] is a woman with a sister named [Nancy]. [Amy] was unhappy with her son, [Dennis], and his grades. She enlisted a tutor to help him.
('Nancy', 'Dennis')
[Amy] is a woman with a sister named [Nancy]. [Amy] was unhappy with her son, [Dennis], and his grades. She enlisted a tutor to help him.
[{('Nancy', 'nephew', 'Dennis'): [('Nancy', 'sister', 'Amy'), ('Amy', 'son', 'Dennis')]}]
['sister', 'son']