[Clarence]'s grandson, [Nicolas], was busy planning a birthday dinner for his brother, [Travis].
('Clarence', 'Travis')
[Clarence]'s grandson, [Nicolas], was busy planning a birthday dinner for his brother, [Travis].
[{('Clarence', 'grandson', 'Travis'): [('Clarence', 'grandson', 'Nicolas'), ('Nicolas', 'brother', 'Travis')]}]
['grandson', 'brother']