[Dale] went to the baseball game with his brother [Nicholas]. [Dale] and his father [Clarence] went to the golf course in town on Saturday and had a great time.
('Clarence', 'Nicholas')
[Dale] and his father [Clarence] went to the golf course in town on Saturday and had a great time. [Dale] went to the baseball game with his brother [Nicholas].
[{('Clarence', 'son', 'Nicholas'): [('Clarence', 'son', 'Dale'), ('Dale', 'brother', 'Nicholas')]}]
['son', 'brother']