[Douglas], [Clarence]'s grandson, was crying. [Clarence] asked the boy what was wrong. [Andrea] and her brother [Douglas] went to the movies together.
('Clarence', 'Andrea')
[Douglas], [Clarence]'s grandson, was crying. [Clarence] asked the boy what was wrong. [Andrea] and her brother [Douglas] went to the movies together.
[{('Clarence', 'granddaughter', 'Andrea'): [('Clarence', 'grandson', 'Douglas'), ('Douglas', 'sister', 'Andrea')]}]
['grandson', 'sister']