[Amy] likes taking her son [Glen] to school. [Clarence] is [Glen]'s grandfather. [Glen] likes to go fishing with his grandfather.
('Amy', 'Clarence')
[Amy] likes taking her son [Glen] to school. [Clarence] is [Glen]'s grandfather. [Glen] likes to go fishing with his grandfather.
[{('Amy', 'father', 'Clarence'): [('Amy', 'son', 'Glen'), ('Glen', 'grandfather', 'Clarence')]}]
['son', 'grandfather']