[Jeff] is going to be spending the weekend with his grandfather [Clarence]. [Nancy] baked a cake for her son [Jeff].
('Nancy', 'Clarence')
[Nancy] baked a cake for her son [Jeff]. [Jeff] is going to be spending the weekend with his grandfather [Clarence].
[{('Nancy', 'father', 'Clarence'): [('Nancy', 'son', 'Jeff'), ('Jeff', 'grandfather', 'Clarence')]}]
['son', 'grandfather']