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