[Nicholas] went to the game with his son [Milton] and his father [Clarence]
('Clarence', 'Milton')
[Nicholas] went to the game with his son [Milton] and his father [Clarence]
[{('Clarence', 'grandson', 'Milton'): [('Clarence', 'son', 'Nicholas'), ('Nicholas', 'son', 'Milton')]}]
['son', 'son']