[John] asked his brother [Douglas] to leave. [Douglas] did, and went to his grandfather [Clarence]'s house, instead.
('John', 'Clarence')
[John] asked his brother [Douglas] to leave. [Douglas] did, and went to his grandfather [Clarence]'s house, instead.
[{('John', 'grandfather', 'Clarence'): [('John', 'brother', 'Douglas'), ('Douglas', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']