[Marie] is taking her nephew [Roberto] to the park. [Pedro] does not know he has a son named [Roberto]. [Pedro] and his brother [Robert] decided to play paintball on Saturday. [Beverly] took her younger sister [Marie] to the carnival last weekend.
('Robert', 'Beverly')
[Pedro] and his brother [Robert] decided to play paintball on Saturday. [Pedro] does not know he has a son named [Roberto]. [Marie] is taking her nephew [Roberto] to the park. [Beverly] took her younger sister [Marie] to the carnival last weekend.
[{('Robert', 'sister', 'Beverly'): [('Robert', 'brother', 'Pedro'), ('Pedro', 'sister', 'Beverly')]}, {('Pedro', 'sister', 'Beverly'): [('Pedro', 'sister', 'Marie'), ('Marie', 'sister', 'Beverly')]}, {('Pedro', 'sister', 'Marie'): [('Pedro', 'son', 'Roberto'), ('Roberto', 'aunt', 'Marie')]}]
['brother', 'son', 'aunt', 'sister']