[Glen] and his sister [Jennifer] went to the movies to watch the newest superhero flick. [Amy]'s son, [Glen], was busy with school activities and forgot to meet his sister.
('Amy', 'Jennifer')
[Amy]'s son, [Glen], was busy with school activities and forgot to meet his sister. [Glen] and his sister [Jennifer] went to the movies to watch the newest superhero flick.
[{('Amy', 'daughter', 'Jennifer'): [('Amy', 'son', 'Glen'), ('Glen', 'sister', 'Jennifer')]}]
['son', 'sister']