[Rebecca] went fishing with her father [Pedro] and brother [Jeffrey] last weekend. They caught a dozen sea bass. [Robert] is frustrated teaching his son how to drive. His son is [Allan]. [Robert] took his nephew [Jeffrey] to the park to play with his friends.
('Pedro', 'Allan')
[Rebecca] went fishing with her father [Pedro] and brother [Jeffrey] last weekend. They caught a dozen sea bass. [Robert] took his nephew [Jeffrey] to the park to play with his friends. [Robert] is frustrated teaching his son how to drive. His son is [Allan].
[{('Pedro', 'nephew', 'Allan'): [('Pedro', 'brother', 'Robert'), ('Robert', 'son', 'Allan')]}, {('Pedro', 'brother', 'Robert'): [('Pedro', 'son', 'Jeffrey'), ('Jeffrey', 'uncle', 'Robert')]}, {('Pedro', 'son', 'Jeffrey'): [('Pedro', 'daughter', 'Rebecca'), ('Rebecca', 'brother', 'Jeffrey')]}]
['daughter', 'brother', 'uncle', 'son']