[Nancy] took her daughter, [Linda], to lunch. [Amy] took her sister [Nancy] out for dinner to celebrate her birthday.
('Linda', 'Amy')
[Nancy] took her daughter, [Linda], to lunch. [Amy] took her sister [Nancy] out for dinner to celebrate her birthday.
[{('Linda', 'aunt', 'Amy'): [('Linda', 'mother', 'Nancy'), ('Nancy', 'sister', 'Amy')]}]
['mother', 'sister']