[Clarence] brought his grandson, [Douglas], out to lunch. [Douglas] always looked up to his brother [John].
('Clarence', 'John')
[Clarence] brought his grandson, [Douglas], out to lunch. [Douglas] always looked up to his brother [John].
[{('Clarence', 'grandson', 'John'): [('Clarence', 'grandson', 'Douglas'), ('Douglas', 'brother', 'John')]}]
['grandson', 'brother']