[Nancy] visited her son [Kevin] at college. [Kevin] is the great aunt of the marvelous [Amy].
('Nancy', 'Amy')
[Nancy] visited her son [Kevin] at college. [Kevin] is the great aunt of the marvelous [Amy].
[{('Nancy', 'sister', 'Amy'): [('Nancy', 'son', 'Kevin'), ('Kevin', 'aunt', 'Amy')]}]
['son', 'aunt']