[Ashley] was over at her grandson [Robert]'s house for the holidays. [Jacob], [Robert]'s brother, was n't able to make it.
('Ashley', 'Jacob')
[Ashley] was over at her grandson [Robert]'s house for the holidays. [Jacob], [Robert]'s brother, was n't able to make it.
[{('Ashley', 'grandson', 'Jacob'): [('Ashley', 'grandson', 'Robert'), ('Robert', 'brother', 'Jacob')]}]
['grandson', 'brother']