[John] asked his father [Robert] if he could have a video game and he said okay. [Shantel] and her husband [Harold] went to the grocery store. [Shantel]'s daughter [Dorothy] stayed home instead. [John]'s grandfather, [Harold], picked him up from school.
('Robert', 'Dorothy')
[John] asked his father [Robert] if he could have a video game and he said okay. [John]'s grandfather, [Harold], picked him up from school. [Shantel] and her husband [Harold] went to the grocery store. [Shantel]'s daughter [Dorothy] stayed home instead.
[{('Robert', 'sister', 'Dorothy'): [('Robert', 'father', 'Harold'), ('Harold', 'daughter', 'Dorothy')]}, {('Robert', 'father', 'Harold'): [('Robert', 'son', 'John'), ('John', 'grandfather', 'Harold')]}, {('Harold', 'daughter', 'Dorothy'): [('Harold', 'wife', 'Shantel'), ('Shantel', 'daughter', 'Dorothy')]}]
['son', 'grandfather', 'wife', 'daughter']