[Wayne] liked to talk about his sister, [Amy]. [Wayne] bought a book for his father [Clarence].
('Clarence', 'Amy')
[Wayne] bought a book for his father [Clarence]. [Wayne] liked to talk about his sister, [Amy].
[{('Clarence', 'daughter', 'Amy'): [('Clarence', 'son', 'Wayne'), ('Wayne', 'sister', 'Amy')]}]
['son', 'sister']