[Nicholas] liked to play games with his sister, [Lillian]. [Ashley] was so excited to learn that her son [Nicholas] got accepted into college.
('Ashley', 'Lillian')
[Ashley] was so excited to learn that her son [Nicholas] got accepted into college. [Nicholas] liked to play games with his sister, [Lillian].
[{('Ashley', 'daughter', 'Lillian'): [('Ashley', 'son', 'Nicholas'), ('Nicholas', 'sister', 'Lillian')]}]
['son', 'sister']