[Robert] went to pick up his son [Mario] from the baseball practice. [Dorothy] loves cooking for her son. His name is [Jerome]. [Mario] and his sister [Angelica] love to play video games. [Dorothy] went to the arcade with her niece, [Angelica]. They had lots of fun playing together.
('Robert', 'Jerome')
[Robert] went to pick up his son [Mario] from the baseball practice. [Mario] and his sister [Angelica] love to play video games. [Dorothy] went to the arcade with her niece, [Angelica]. They had lots of fun playing together. [Dorothy] loves cooking for her son. His name is [Jerome].
[{('Robert', 'nephew', 'Jerome'): [('Robert', 'sister', 'Dorothy'), ('Dorothy', 'son', 'Jerome')]}, {('Robert', 'sister', 'Dorothy'): [('Robert', 'daughter', 'Angelica'), ('Angelica', 'aunt', 'Dorothy')]}, {('Robert', 'daughter', 'Angelica'): [('Robert', 'son', 'Mario'), ('Mario', 'sister', 'Angelica')]}]
['son', 'sister', 'aunt', 'son']