[Dorothy] went to the store with her son [Roberto]. Meanwhile, [Dorothy]'s husband [Pedro] stayed home with [Pedro]'s son, [Jeffrey]. [Harold] loves picking out new toys for his grandson [Jeffrey].
('Harold', 'Roberto')
[Harold] loves picking out new toys for his grandson [Jeffrey]. [Dorothy] went to the store with her son [Roberto]. Meanwhile, [Dorothy]'s husband [Pedro] stayed home with [Pedro]'s son, [Jeffrey].
[{('Harold', 'grandson', 'Roberto'): [('Harold', 'grandson', 'Jeffrey'), ('Jeffrey', 'brother', 'Roberto')]}, {('Jeffrey', 'brother', 'Roberto'): [('Jeffrey', 'father', 'Pedro'), ('Pedro', 'son', 'Roberto')]}, {('Pedro', 'son', 'Roberto'): [('Pedro', 'wife', 'Dorothy'), ('Dorothy', 'son', 'Roberto')]}]
['grandson', 'father', 'wife', 'son']