[Douglas] was playing golf with his uncle [Nicholas]. [Douglas] and his father [George] went to the golf course in town on Saturday and had a great time.
('George', 'Nicholas')
[Douglas] and his father [George] went to the golf course in town on Saturday and had a great time. [Douglas] was playing golf with his uncle [Nicholas].
[{('George', 'brother', 'Nicholas'): [('George', 'son', 'Douglas'), ('Douglas', 'uncle', 'Nicholas')]}]
['son', 'uncle']