[Nicholas] took his son [Dennis] to school this morning because he missed the bus. [Clarence] is retired and likes to ride his golf cart around the beach. His grandson [Dennis] stayed with him all summer and he loved riding in the golf cart.
('Nicholas', 'Clarence')
[Nicholas] took his son [Dennis] to school this morning because he missed the bus. [Clarence] is retired and likes to ride his golf cart around the beach. His grandson [Dennis] stayed with him all summer and he loved riding in the golf cart.
[{('Nicholas', 'father', 'Clarence'): [('Nicholas', 'son', 'Dennis'), ('Dennis', 'grandfather', 'Clarence')]}]
['son', 'grandfather']