[Mary] does n't like having to babysit her younger brother, [Dennis]. [Clarence] has a granddaughter named [Mary].
('Clarence', 'Dennis')
[Clarence] has a granddaughter named [Mary]. [Mary] does n't like having to babysit her younger brother, [Dennis].
[{('Clarence', 'grandson', 'Dennis'): [('Clarence', 'granddaughter', 'Mary'), ('Mary', 'brother', 'Dennis')]}]
['granddaughter', 'brother']