[Timothy] met his uncle, [Nicholas], at the zoo for some fun. [George] went to the baseball game with his son [Timothy]
('George', 'Nicholas')
[George] went to the baseball game with his son [Timothy] [Timothy] met his uncle, [Nicholas], at the zoo for some fun.
[{('George', 'brother', 'Nicholas'): [('George', 'son', 'Timothy'), ('Timothy', 'uncle', 'Nicholas')]}]
['son', 'uncle']