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