[Wayne] and his son, [Robert], recently heard that [Clarence] was in the hospital. [Robert] loves his grandfather very much, and went to visit [Clarence] immediately, but [Wayne] was too busy.
('Wayne', 'Clarence')
[Wayne] and his son, [Robert], recently heard that [Clarence] was in the hospital. [Robert] loves his grandfather very much, and went to visit [Clarence] immediately, but [Wayne] was too busy.
[{('Wayne', 'father', 'Clarence'): [('Wayne', 'son', 'Robert'), ('Robert', 'grandfather', 'Clarence')]}]
['son', 'grandfather']