[Robert] has always preferred the company of his grandmother, [Ashley]. [Nancy] likes taking her son [Robert] to school.
('Nancy', 'Ashley')
[Nancy] likes taking her son [Robert] to school. [Robert] has always preferred the company of his grandmother, [Ashley].
[{('Nancy', 'mother', 'Ashley'): [('Nancy', 'son', 'Robert'), ('Robert', 'grandmother', 'Ashley')]}]
['son', 'grandmother']