[Clarence] is a proud grandfather of [Kevin]. [Kevin] has a great relationship with his mother [Nancy].
('Nancy', 'Clarence')
[Clarence] is a proud grandfather of [Kevin]. [Kevin] has a great relationship with his mother [Nancy].
[{('Nancy', 'father', 'Clarence'): [('Nancy', 'son', 'Kevin'), ('Kevin', 'grandfather', 'Clarence')]}]
['son', 'grandfather']