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