[Belva] went on a vacation with her brother [Nicolas]. [Nicolas]'s grandfather is [Clarence].
('Belva', 'Clarence')
[Belva] went on a vacation with her brother [Nicolas]. [Nicolas]'s grandfather is [Clarence].
[{('Belva', 'grandfather', 'Clarence'): [('Belva', 'brother', 'Nicolas'), ('Nicolas', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']