[Ernest]'s brother [Herman] came over to help him renovate the kitchen. [Mary], [Ernest]'s mother, brought over a home-made lunch.
('Mary', 'Herman')
[Ernest]'s brother [Herman] came over to help him renovate the kitchen. [Mary], [Ernest]'s mother, brought over a home-made lunch.
[{('Mary', 'son', 'Herman'): [('Mary', 'son', 'Ernest'), ('Ernest', 'brother', 'Herman')]}]