[Robert] and his brother [Jeff] were playing in the room. [Clarence] told [Robert] that he need to talk to him in private, so [Robert] left the room to talk to his grandfather.
('Clarence', 'Jeff')
[Robert] and his brother [Jeff] were playing in the room. [Clarence] told [Robert] that he need to talk to him in private, so [Robert] left the room to talk to his grandfather.
[{('Clarence', 'grandson', 'Jeff'): [('Clarence', 'grandson', 'Robert'), ('Robert', 'brother', 'Jeff')]}]
['grandson', 'brother']