[Wayne] and his brother [Dale] went to the park. They threw a ball around and played with their dog. [Dale] asked his father, [Clarence] to help him build a birdhouse.
('Clarence', 'Wayne')
[Dale] asked his father, [Clarence] to help him build a birdhouse. [Wayne] and his brother [Dale] went to the park. They threw a ball around and played with their dog.
[{('Clarence', 'son', 'Wayne'): [('Clarence', 'son', 'Dale'), ('Dale', 'brother', 'Wayne')]}]
['son', 'brother']