[Pedro] loved teaching his son, [James], baseball. [Dorothy] just dropped off her son, [Roberto], at soccer practice. Now she was on her to way to pick up her other son, [Jeffrey], from basketball practice. [James] took his brother [Roberto] to Las Vegas to go gambling.
('Pedro', 'Jeffrey')
[Pedro] loved teaching his son, [James], baseball. [James] took his brother [Roberto] to Las Vegas to go gambling. [Dorothy] just dropped off her son, [Roberto], at soccer practice. Now she was on her to way to pick up her other son, [Jeffrey], from basketball practice.
[{('Pedro', 'son', 'Jeffrey'): [('Pedro', 'son', 'Roberto'), ('Roberto', 'brother', 'Jeffrey')]}, {('Pedro', 'son', 'Roberto'): [('Pedro', 'son', 'James'), ('James', 'brother', 'Roberto')]}, {('Roberto', 'brother', 'Jeffrey'): [('Roberto', 'mother', 'Dorothy'), ('Dorothy', 'son', 'Jeffrey')]}]
['son', 'brother', 'mother', 'son']