[Roberto] visited his aunt [Beverly]. [Roberto] played catch with his dad, [Pedro] [Beverly] does n't like having to babysit her younger brother, [Robert]. [Antonio] always looked up to his brother [Pedro].
('Antonio', 'Robert')
[Antonio] always looked up to his brother [Pedro]. [Roberto] played catch with his dad, [Pedro] [Roberto] visited his aunt [Beverly]. [Beverly] does n't like having to babysit her younger brother, [Robert].
[{('Antonio', 'brother', 'Robert'): [('Antonio', 'sister', 'Beverly'), ('Beverly', 'brother', 'Robert')]}, {('Antonio', 'sister', 'Beverly'): [('Antonio', 'brother', 'Pedro'), ('Pedro', 'sister', 'Beverly')]}, {('Pedro', 'sister', 'Beverly'): [('Pedro', 'son', 'Roberto'), ('Roberto', 'aunt', 'Beverly')]}]
['brother', 'son', 'aunt', 'brother']