[Clarence] drove his daughter [Theresa] to school yesterday because she missed the bus. [Theresa]'s son [Tony] missed seeing his mother on the weekends.
('Tony', 'Clarence')
[Theresa]'s son [Tony] missed seeing his mother on the weekends. [Clarence] drove his daughter [Theresa] to school yesterday because she missed the bus.
[{('Tony', 'grandfather', 'Clarence'): [('Tony', 'mother', 'Theresa'), ('Theresa', 'father', 'Clarence')]}]
['mother', 'father']