[Natalia] and her brother, [Dennis], were playing out in the street in front of their home. [Amy], [Dennis]'s mother, called out to them to get on the sidewalk.
('Natalia', 'Amy')
[Natalia] and her brother, [Dennis], were playing out in the street in front of their home. [Amy], [Dennis]'s mother, called out to them to get on the sidewalk.
[{('Natalia', 'mother', 'Amy'): [('Natalia', 'brother', 'Dennis'), ('Dennis', 'mother', 'Amy')]}]
['brother', 'mother']