[Nicolas] is going to pick his grandfather, [Clarence] up after he has dinner with his brother, [Travis].
('Travis', 'Clarence')
[Nicolas] is going to pick his grandfather, [Clarence] up after he has dinner with his brother, [Travis].
[{('Travis', 'grandfather', 'Clarence'): [('Travis', 'brother', 'Nicolas'), ('Nicolas', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']