[Jerry] often goes out for lunch with his sister, [April]. [George]'s son, [Jerry], had been misbehaving, so [George] had to spank him.
('George', 'April')
[George]'s son, [Jerry], had been misbehaving, so [George] had to spank him. [Jerry] often goes out for lunch with his sister, [April].
[{('George', 'daughter', 'April'): [('George', 'son', 'Jerry'), ('Jerry', 'sister', 'April')]}]
['son', 'sister']