[Dorothy]'s daughter [Heather] got in a fight with [Dorothy]'s son [Jeffrey] resulting in them both getting grounded. [Pedro]'s son, [Roberto], went to the candy store. [Roberto]'s brother, [Jeffrey], went with him.
('Pedro', 'Heather')
[Pedro]'s son, [Roberto], went to the candy store. [Roberto]'s brother, [Jeffrey], went with him. [Dorothy]'s daughter [Heather] got in a fight with [Dorothy]'s son [Jeffrey] resulting in them both getting grounded.
[{('Pedro', 'daughter', 'Heather'): [('Pedro', 'son', 'Roberto'), ('Roberto', 'sister', 'Heather')]}, {('Roberto', 'sister', 'Heather'): [('Roberto', 'mother', 'Dorothy'), ('Dorothy', 'daughter', 'Heather')]}, {('Roberto', 'mother', 'Dorothy'): [('Roberto', 'brother', 'Jeffrey'), ('Jeffrey', 'mother', 'Dorothy')]}]
['son', 'brother', 'mother', 'daughter']