[Joshua] made a grilled cheese for his son [Don]. [Don]'s brother [Joseph] ate a salad. [Clarence] and his brother [Joseph] went to the arcade. They had a wonderful time.
('Joshua', 'Clarence')
[Joshua] made a grilled cheese for his son [Don]. [Don]'s brother [Joseph] ate a salad. [Clarence] and his brother [Joseph] went to the arcade. They had a wonderful time.
[{('Joshua', 'son', 'Clarence'): [('Joshua', 'son', 'Don'), ('Don', 'brother', 'Clarence')]}, {('Don', 'brother', 'Clarence'): [('Don', 'brother', 'Joseph'), ('Joseph', 'brother', 'Clarence')]}]
['son', 'brother', 'brother']