[Lillian]'s brother [Dale] was going to be the star in the new show. [Nancy] was playing hide-and-seek with her sister [Lillian].
('Nancy', 'Dale')
[Nancy] was playing hide-and-seek with her sister [Lillian]. [Lillian]'s brother [Dale] was going to be the star in the new show.
[{('Nancy', 'brother', 'Dale'): [('Nancy', 'sister', 'Lillian'), ('Lillian', 'brother', 'Dale')]}]
['sister', 'brother']