[Adan] bought a book for his father [John]. [Robert] always looked up to his big brother [Adan] and wanted to be just like him.
('John', 'Robert')
[Adan] bought a book for his father [John]. [Robert] always looked up to his big brother [Adan] and wanted to be just like him.
[{('John', 'son', 'Robert'): [('John', 'son', 'Adan'), ('Adan', 'brother', 'Robert')]}]