[Ashley] took her daughter [Nancy] to see her very first ballet performance. [Nancy] and her sister [Amy] played golf together. [Nancy] won easily.
('Amy', 'Ashley')
[Nancy] and her sister [Amy] played golf together. [Nancy] won easily. [Ashley] took her daughter [Nancy] to see her very first ballet performance.
[{('Amy', 'mother', 'Ashley'): [('Amy', 'sister', 'Nancy'), ('Nancy', 'mother', 'Ashley')]}]
['sister', 'mother']