[Amy] took her younger sister [Theresa] to the carnival last weekend. [James] wanted to buy his mother, [Theresa], a birthday present. But he did n't know what to get her.
('James', 'Amy')
[James] wanted to buy his mother, [Theresa], a birthday present. But he did n't know what to get her. [Amy] took her younger sister [Theresa] to the carnival last weekend.
[{('James', 'aunt', 'Amy'): [('James', 'mother', 'Theresa'), ('Theresa', 'sister', 'Amy')]}]
['mother', 'sister']