[Roy] made a grilled cheese for his son [Herman]. [Herman]'s brother [Jacob] ate a salad.
('Roy', 'Jacob')
[Roy] made a grilled cheese for his son [Herman]. [Herman]'s brother [Jacob] ate a salad.
[{('Roy', 'son', 'Jacob'): [('Roy', 'son', 'Herman'), ('Herman', 'brother', 'Jacob')]}]