[Nancy] took her younger sister [Amy] to the carnival last weekend. [Nancy] does n't like her brother [Dale].
('Amy', 'Dale')
[Nancy] took her younger sister [Amy] to the carnival last weekend. [Nancy] does n't like her brother [Dale].
[{('Amy', 'brother', 'Dale'): [('Amy', 'sister', 'Nancy'), ('Nancy', 'brother', 'Dale')]}]
['sister', 'brother']