[James] is taking his grandson [Joseph] to the doctor while his mother is at work. [Thomas] and his brother [Clarence] went to the football game together. [Thomas] went to the grocery store for his brother [Joseph], because he broke his leg.
('James', 'Clarence')
[James] is taking his grandson [Joseph] to the doctor while his mother is at work. [Thomas] went to the grocery store for his brother [Joseph], because he broke his leg. [Thomas] and his brother [Clarence] went to the football game together.
[{('James', 'grandson', 'Clarence'): [('James', 'grandson', 'Joseph'), ('Joseph', 'brother', 'Clarence')]}, {('Joseph', 'brother', 'Clarence'): [('Joseph', 'brother', 'Thomas'), ('Thomas', 'brother', 'Clarence')]}]
['grandson', 'brother', 'brother']