[Adan] went to visit his grandmother [Mary] on Sunday and his brother [Brent] stayed home because he had a cold.
('Brent', 'Mary')
[Adan] went to visit his grandmother [Mary] on Sunday and his brother [Brent] stayed home because he had a cold.
[{('Brent', 'grandmother', 'Mary'): [('Brent', 'brother', 'Adan'), ('Adan', 'grandmother', 'Mary')]}]