[Harold] favored his son [Antonio] over his other son [Robert]. [Kevin] was sad to learn that his sister [Erika] was not going to make it to dinner like they had planned. [Antonio] was so proud that his son [Kevin] won the science fair!
('Robert', 'Erika')
[Harold] favored his son [Antonio] over his other son [Robert]. [Antonio] was so proud that his son [Kevin] won the science fair! [Kevin] was sad to learn that his sister [Erika] was not going to make it to dinner like they had planned.
[{('Robert', 'niece', 'Erika'): [('Robert', 'brother', 'Antonio'), ('Antonio', 'daughter', 'Erika')]}, {('Robert', 'brother', 'Antonio'): [('Robert', 'father', 'Harold'), ('Harold', 'son', 'Antonio')]}, {('Antonio', 'daughter', 'Erika'): [('Antonio', 'son', 'Kevin'), ('Kevin', 'sister', 'Erika')]}]
['father', 'son', 'son', 'sister']