[Ashley] took her son [Nicholas] to the park for the afternoon. [Nicholas]'s sister, [Nancy], participated in the dance contest.
('Ashley', 'Nancy')
[Ashley] took her son [Nicholas] to the park for the afternoon. [Nicholas]'s sister, [Nancy], participated in the dance contest.
[{('Ashley', 'daughter', 'Nancy'): [('Ashley', 'son', 'Nicholas'), ('Nicholas', 'sister', 'Nancy')]}]
['son', 'sister']