[Tony] gets to stay with his grandfather, [Clarence] every weekend. [Dale] loved teaching his son, [Tony], baseball.
('Dale', 'Clarence')
[Dale] loved teaching his son, [Tony], baseball. [Tony] gets to stay with his grandfather, [Clarence] every weekend.
[{('Dale', 'father', 'Clarence'): [('Dale', 'son', 'Tony'), ('Tony', 'grandfather', 'Clarence')]}]
['son', 'grandfather']