[Dorothy] loved to care for her newborn child [Roberto]. [Roberto]'s aunt, [Marie], was ten minutes late to his baseball game. [Dorothy] took her son [Roberto] to the park. [Marie] went out for pizza with her father [Harold].
('Roberto', 'Harold')
[Dorothy] took her son [Roberto] to the park. [Dorothy] loved to care for her newborn child [Roberto]. [Roberto]'s aunt, [Marie], was ten minutes late to his baseball game. [Marie] went out for pizza with her father [Harold].
[{('Roberto', 'grandfather', 'Harold'): [('Roberto', 'mother', 'Dorothy'), ('Dorothy', 'father', 'Harold')]}, {('Dorothy', 'father', 'Harold'): [('Dorothy', 'sister', 'Marie'), ('Marie', 'father', 'Harold')]}, {('Dorothy', 'sister', 'Marie'): [('Dorothy', 'son', 'Roberto'), ('Roberto', 'aunt', 'Marie')]}]
['mother', 'son', 'aunt', 'father']