[Dennis] and his brother [Glen] were rarely seen apart. [Clarence] had a grandson [Dennis] who went to college at his alma mater. [Dennis] graduated with honors
('Clarence', 'Glen')
[Clarence] had a grandson [Dennis] who went to college at his alma mater. [Dennis] graduated with honors [Dennis] and his brother [Glen] were rarely seen apart.
[{('Clarence', 'grandson', 'Glen'): [('Clarence', 'grandson', 'Dennis'), ('Dennis', 'brother', 'Glen')]}]
['grandson', 'brother']