[Amy] asked her sister [Theresa] to hurry up and get off the phone. [Amy]'s sister [Nancy] told her to wait her turn and be more patient.
('Theresa', 'Nancy')
[Amy] asked her sister [Theresa] to hurry up and get off the phone. [Amy]'s sister [Nancy] told her to wait her turn and be more patient.
[{('Theresa', 'sister', 'Nancy'): [('Theresa', 'sister', 'Amy'), ('Amy', 'sister', 'Nancy')]}]
['sister', 'sister']