[Antonio] decided to take his son, [Bernardo], on a ski vacation. [Louis] wants to throw a surprise party for his brother [Antonio]. [Louis]'s brother [Pedro] helps pick the decorations. [Robert] and his brother [Pedro] were rarely seen apart.
('Robert', 'Bernardo')
[Robert] and his brother [Pedro] were rarely seen apart. [Louis] wants to throw a surprise party for his brother [Antonio]. [Louis]'s brother [Pedro] helps pick the decorations. [Antonio] decided to take his son, [Bernardo], on a ski vacation.
[{('Robert', 'nephew', 'Bernardo'): [('Robert', 'brother', 'Antonio'), ('Antonio', 'son', 'Bernardo')]}, {('Robert', 'brother', 'Antonio'): [('Robert', 'brother', 'Pedro'), ('Pedro', 'brother', 'Antonio')]}, {('Pedro', 'brother', 'Antonio'): [('Pedro', 'brother', 'Louis'), ('Louis', 'brother', 'Antonio')]}]
['brother', 'brother', 'brother', 'son']