[Ashley] took her grandson [Dennis] to taekwondo practice. [Dennis] and his sister [Jennifer] went to the movies to watch the newest superhero flick.
('Ashley', 'Jennifer')
[Ashley] took her grandson [Dennis] to taekwondo practice. [Dennis] and his sister [Jennifer] went to the movies to watch the newest superhero flick.
[{('Ashley', 'granddaughter', 'Jennifer'): [('Ashley', 'grandson', 'Dennis'), ('Dennis', 'sister', 'Jennifer')]}]
['grandson', 'sister']