[Rosetta]'s mother, [Theresa], was sick. [Theresa]'s sister, [Nancy], was taking care of her.
('Rosetta', 'Nancy')
[Rosetta]'s mother, [Theresa], was sick. [Theresa]'s sister, [Nancy], was taking care of her.
[{('Rosetta', 'aunt', 'Nancy'): [('Rosetta', 'mother', 'Theresa'), ('Theresa', 'sister', 'Nancy')]}]
['mother', 'sister']