[Jerry] and his uncle [Dale] went fishing yesterday. They caught many trout. [George] decided to take his son, [Jerry], on a ski vacation.
('George', 'Dale')
[George] decided to take his son, [Jerry], on a ski vacation. [Jerry] and his uncle [Dale] went fishing yesterday. They caught many trout.
[{('George', 'brother', 'Dale'): [('George', 'son', 'Jerry'), ('Jerry', 'uncle', 'Dale')]}]
['son', 'uncle']