[Wesley] took his son [Chris] and his brother [Francisco], and sister [David] to the beach during summer break.
('David', 'Chris')
[Wesley] took his son [Chris] and his brother [Francisco], and sister [David] to the beach during summer break.
[{('David', 'nephew', 'Chris'): [('David', 'brother', 'Wesley'), ('Wesley', 'son', 'Chris')]}, {('David', 'brother', 'Wesley'): [('David', 'brother', 'Francisco'), ('Francisco', 'brother', 'Wesley')]}]
['brother', 'brother', 'son']