[Nicolas] wanted to go to the bookstore with his grandfather, [Clarence], but [Nicolas]'s brother, [Travis], told him that [Clarence] wo n't be able to come today.
('Clarence', 'Travis')
[Nicolas] wanted to go to the bookstore with his grandfather, [Clarence], but [Nicolas]'s brother, [Travis], told him that [Clarence] wo n't be able to come today.
[{('Clarence', 'grandson', 'Travis'): [('Clarence', 'grandson', 'Nicolas'), ('Nicolas', 'brother', 'Travis')]}]
['grandson', 'brother']