[Amy] likes taking her son [Glen] to school. [Amy]'s father, [Clarence], took her to school this morning.
('Clarence', 'Glen')
[Amy]'s father, [Clarence], took her to school this morning. [Amy] likes taking her son [Glen] to school.
[{('Clarence', 'grandson', 'Glen'): [('Clarence', 'daughter', 'Amy'), ('Amy', 'son', 'Glen')]}]
['daughter', 'son']