[Jacob] and his brother [Jeff] do n't get along very well, so [Jacob], who is [Clarence]'s grandson, spends most of his time with [Clarence] instead.
('Clarence', 'Jeff')
[Jacob] and his brother [Jeff] do n't get along very well, so [Jacob], who is [Clarence]'s grandson, spends most of his time with [Clarence] instead.
[{('Clarence', 'grandson', 'Jeff'): [('Clarence', 'grandson', 'Jacob'), ('Jacob', 'brother', 'Jeff')]}]
['grandson', 'brother']