[Dennis] got mad at his brother [Milton] after he stole his pretzels. [Nicholas] was so proud that his son [Milton] won the science fair!
('Nicholas', 'Dennis')
[Nicholas] was so proud that his son [Milton] won the science fair! [Dennis] got mad at his brother [Milton] after he stole his pretzels.
[{('Nicholas', 'son', 'Dennis'): [('Nicholas', 'son', 'Milton'), ('Milton', 'brother', 'Dennis')]}]
['son', 'brother']