[Linda] loves her brother [Jeff]. [Jeff] is going to be spending the weekend with his grandfather [Clarence].
('Linda', 'Clarence')
[Linda] loves her brother [Jeff]. [Jeff] is going to be spending the weekend with his grandfather [Clarence].
[{('Linda', 'grandfather', 'Clarence'): [('Linda', 'brother', 'Jeff'), ('Jeff', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']