[Jacob] and his brother [John] went fishing but [Jacob] did n't invite his other brother [Herman].
('Herman', 'John')
[Jacob] and his brother [John] went fishing but [Jacob] did n't invite his other brother [Herman].
[{('Herman', 'brother', 'John'): [('Herman', 'brother', 'Jacob'), ('Jacob', 'brother', 'John')]}]