[Harold] bought a book for his son [Antonio]. [Robert] took his daughter [Angelica] to see a movie. [Angelica]'s sister [Lizzie] was sad because she was grounded and was not allowed to go. [Antonio] is picking up his niece [Lizzie] from school today because her parents are both working.
('Robert', 'Harold')
[Robert] took his daughter [Angelica] to see a movie. [Angelica]'s sister [Lizzie] was sad because she was grounded and was not allowed to go. [Antonio] is picking up his niece [Lizzie] from school today because her parents are both working. [Harold] bought a book for his son [Antonio].
[{('Robert', 'father', 'Harold'): [('Robert', 'brother', 'Antonio'), ('Antonio', 'father', 'Harold')]}, {('Robert', 'brother', 'Antonio'): [('Robert', 'daughter', 'Lizzie'), ('Lizzie', 'uncle', 'Antonio')]}, {('Robert', 'daughter', 'Lizzie'): [('Robert', 'daughter', 'Angelica'), ('Angelica', 'sister', 'Lizzie')]}]
['daughter', 'sister', 'uncle', 'father']