[Wesley] was happy that his son [Irvin] was doing well in college. [Chris] went to dinner with his grandfather, [James]. [Chris] was upset that his brother, [Irvin], could n't be at the dinner.
('Wesley', 'James')
[Wesley] was happy that his son [Irvin] was doing well in college. [Chris] went to dinner with his grandfather, [James]. [Chris] was upset that his brother, [Irvin], could n't be at the dinner.
[{('Wesley', 'father', 'James'): [('Wesley', 'son', 'Irvin'), ('Irvin', 'grandfather', 'James')]}, {('Irvin', 'grandfather', 'James'): [('Irvin', 'brother', 'Chris'), ('Chris', 'grandfather', 'James')]}]
['son', 'brother', 'grandfather']