[Dennis] went to the grocery store for his brother [Michael], because he broke his leg. [Clarence] asked his grandson, [Michael], what he wanted to be when he grew up. [Michael] told him he wanted to be a grandpa.
('Clarence', 'Dennis')
[Clarence] asked his grandson, [Michael], what he wanted to be when he grew up. [Michael] told him he wanted to be a grandpa. [Dennis] went to the grocery store for his brother [Michael], because he broke his leg.
[{('Clarence', 'grandson', 'Dennis'): [('Clarence', 'grandson', 'Michael'), ('Michael', 'brother', 'Dennis')]}]
['grandson', 'brother']