[Nicholas] took his daughter [Natalia] to see a movie. [Natalia]'s sister [Emily] was sad because she was grounded and was not allowed to go.
('Nicholas', 'Emily')
[Nicholas] took his daughter [Natalia] to see a movie. [Natalia]'s sister [Emily] was sad because she was grounded and was not allowed to go.
[{('Nicholas', 'daughter', 'Emily'): [('Nicholas', 'daughter', 'Natalia'), ('Natalia', 'sister', 'Emily')]}]
['daughter', 'sister']