[Clarence]'s daughter, [Amy], is having some trouble. Her son, [Glen], is n't doing well in school.
('Clarence', 'Glen')
[Clarence]'s daughter, [Amy], is having some trouble. Her son, [Glen], is n't doing well in school.
[{('Clarence', 'grandson', 'Glen'): [('Clarence', 'daughter', 'Amy'), ('Amy', 'son', 'Glen')]}]
['daughter', 'son']