[Michael]'s grandpa [Clarence] taught him and his brother [Milton] how to hunt and fish when they were both still very young.
('Milton', 'Clarence')
[Michael]'s grandpa [Clarence] taught him and his brother [Milton] how to hunt and fish when they were both still very young.
[{('Milton', 'grandfather', 'Clarence'): [('Milton', 'brother', 'Michael'), ('Michael', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']