[Dennis] invited his sister [Natalia] out to watch the meteor shower. [Amy] gave her son, [Dennis], blankets for them to sit on and snacks to eat while they watched the meteors.
('Amy', 'Natalia')
[Dennis] invited his sister [Natalia] out to watch the meteor shower. [Amy] gave her son, [Dennis], blankets for them to sit on and snacks to eat while they watched the meteors.
[{('Amy', 'daughter', 'Natalia'): [('Amy', 'son', 'Dennis'), ('Dennis', 'sister', 'Natalia')]}]
['son', 'sister']