[Ashley] took her daughter, [Nancy], out for pizza. [Robert], [Nancy]'s son, came too.
('Ashley', 'Robert')
[Ashley] took her daughter, [Nancy], out for pizza. [Robert], [Nancy]'s son, came too.
[{('Ashley', 'grandson', 'Robert'): [('Ashley', 'daughter', 'Nancy'), ('Nancy', 'son', 'Robert')]}]
['daughter', 'son']