[Wayne] and his son, [Jeff], helped his father [Clarence] with house chores.
('Clarence', 'Jeff')
[Wayne] and his son, [Jeff], helped his father [Clarence] with house chores.
[{('Clarence', 'grandson', 'Jeff'): [('Clarence', 'son', 'Wayne'), ('Wayne', 'son', 'Jeff')]}]
['son', 'son']