[Douglas] and his father [George] went jogging by the lake. [Douglas] is really looking forward to a visit from his uncle [Dale].
('George', 'Dale')
[Douglas] and his father [George] went jogging by the lake. [Douglas] is really looking forward to a visit from his uncle [Dale].
[{('George', 'brother', 'Dale'): [('George', 'son', 'Douglas'), ('Douglas', 'uncle', 'Dale')]}]
['son', 'uncle']