[Linda] does n't like having to babysit her younger brother, [Robert]. [Robert] loves his grandfather [Clarence], very much. [Clarence] loves him, too.
('Linda', 'Clarence')
[Linda] does n't like having to babysit her younger brother, [Robert]. [Robert] loves his grandfather [Clarence], very much. [Clarence] loves him, too.
[{('Linda', 'grandfather', 'Clarence'): [('Linda', 'brother', 'Robert'), ('Robert', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']