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