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