[Clarence] is the proud grandfather of the cute [John]. [Lillian] took her son [John] to the park for the afternoon.
('Lillian', 'Clarence')
[Lillian] took her son [John] to the park for the afternoon. [Clarence] is the proud grandfather of the cute [John].
[{('Lillian', 'father', 'Clarence'): [('Lillian', 'son', 'John'), ('John', 'grandfather', 'Clarence')]}]
['son', 'grandfather']