[Clarence] is taking his son [Wayne] out for coffee. [Wayne] liked to play games with his sister, [Lillian].
('Clarence', 'Lillian')
[Clarence] is taking his son [Wayne] out for coffee. [Wayne] liked to play games with his sister, [Lillian].
[{('Clarence', 'daughter', 'Lillian'): [('Clarence', 'son', 'Wayne'), ('Wayne', 'sister', 'Lillian')]}]
['son', 'sister']