[Roberto] is love by his father [Pedro]. [Jeffrey] loves his brother [Roberto]. [Jeffrey] visited his aunt [Tracy]. [Beverly] was sewing a sweater for her sister [Tracy].
('Pedro', 'Beverly')
[Roberto] is love by his father [Pedro]. [Jeffrey] loves his brother [Roberto]. [Jeffrey] visited his aunt [Tracy]. [Beverly] was sewing a sweater for her sister [Tracy].
[{('Pedro', 'sister', 'Beverly'): [('Pedro', 'sister', 'Tracy'), ('Tracy', 'sister', 'Beverly')]}, {('Pedro', 'sister', 'Tracy'): [('Pedro', 'son', 'Jeffrey'), ('Jeffrey', 'aunt', 'Tracy')]}, {('Pedro', 'son', 'Jeffrey'): [('Pedro', 'son', 'Roberto'), ('Roberto', 'brother', 'Jeffrey')]}]
['son', 'brother', 'aunt', 'sister']