[Glen] went fishing with his grandfather [Clarence]. They spent all day together. [Michael] needed his brother, [Glen], to help with a problem
('Michael', 'Clarence')
[Michael] needed his brother, [Glen], to help with a problem [Glen] went fishing with his grandfather [Clarence]. They spent all day together.
[{('Michael', 'grandfather', 'Clarence'): [('Michael', 'brother', 'Glen'), ('Glen', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']