[Wayne] went to the park with his father, [Clarence]. [Wayne] went to pick up his son [Jacob] from the baseball practice.
('Clarence', 'Jacob')
[Wayne] went to the park with his father, [Clarence]. [Wayne] went to pick up his son [Jacob] from the baseball practice.
[{('Clarence', 'grandson', 'Jacob'): [('Clarence', 'son', 'Wayne'), ('Wayne', 'son', 'Jacob')]}]
['son', 'son']