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