[Clarence] took his daughter [Lillian] out for lunch one day. [Lillian] asked if she could bring her son [Jerry] and [Clarence] said okay.
('Clarence', 'Jerry')
[Clarence] took his daughter [Lillian] out for lunch one day. [Lillian] asked if she could bring her son [Jerry] and [Clarence] said okay.
[{('Clarence', 'grandson', 'Jerry'): [('Clarence', 'daughter', 'Lillian'), ('Lillian', 'son', 'Jerry')]}]
['daughter', 'son']