[Nancy] went car shopping with her brother [Nicholas]. [Nancy] likes taking her son [Jacob] to school.
('Nicholas', 'Jacob')
[Nancy] went car shopping with her brother [Nicholas]. [Nancy] likes taking her son [Jacob] to school.
[{('Nicholas', 'nephew', 'Jacob'): [('Nicholas', 'sister', 'Nancy'), ('Nancy', 'son', 'Jacob')]}]
['sister', 'son']