[Clarence] took his grandson [Timothy] out for ice cream. [Timothy]'s sister, [Andrea], could n't join them because she had soccer practice.
('Clarence', 'Andrea')
[Clarence] took his grandson [Timothy] out for ice cream. [Timothy]'s sister, [Andrea], could n't join them because she had soccer practice.
[{('Clarence', 'granddaughter', 'Andrea'): [('Clarence', 'grandson', 'Timothy'), ('Timothy', 'sister', 'Andrea')]}]
['grandson', 'sister']