[Herman] and his brother [Jacob] are looking for a good gift for [Jacob]'s mother [Mary].
('Mary', 'Herman')
[Herman] and his brother [Jacob] are looking for a good gift for [Jacob]'s mother [Mary].
[{('Mary', 'son', 'Herman'): [('Mary', 'son', 'Jacob'), ('Jacob', 'brother', 'Herman')]}]