[Robert] received a nice gift from his grandfather [Clarence]. [Robert] was so proud he showed it to his mother [Nancy].
('Nancy', 'Clarence')
[Robert] received a nice gift from his grandfather [Clarence]. [Robert] was so proud he showed it to his mother [Nancy].
[{('Nancy', 'father', 'Clarence'): [('Nancy', 'son', 'Robert'), ('Robert', 'grandfather', 'Clarence')]}]
['son', 'grandfather']