[Jerry] loved his mother, [Lillian]. [Clarence] is [Jerry]'s favorite grandfather.
('Lillian', 'Clarence')
[Jerry] loved his mother, [Lillian]. [Clarence] is [Jerry]'s favorite grandfather.
[{('Lillian', 'father', 'Clarence'): [('Lillian', 'son', 'Jerry'), ('Jerry', 'grandfather', 'Clarence')]}]
['son', 'grandfather']