[Adan] and his brother [Brent] baked chocolate chip cookies for [Ann], [Brent]'s sister.
('Adan', 'Ann')
[Adan] and his brother [Brent] baked chocolate chip cookies for [Ann], [Brent]'s sister.
[{('Adan', 'sister', 'Ann'): [('Adan', 'brother', 'Brent'), ('Brent', 'sister', 'Ann')]}]