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