[Kevin] liked to play games with his sister, [Erika]. [Antonio] and his son, [Kevin], helped his father [Harold] with house chores. [Laura] took her sister [Erika] out for dinner to celebrate her birthday.
('Harold', 'Laura')
[Antonio] and his son, [Kevin], helped his father [Harold] with house chores. [Kevin] liked to play games with his sister, [Erika]. [Laura] took her sister [Erika] out for dinner to celebrate her birthday.
[{('Harold', 'granddaughter', 'Laura'): [('Harold', 'son', 'Antonio'), ('Antonio', 'daughter', 'Laura')]}, {('Antonio', 'daughter', 'Laura'): [('Antonio', 'daughter', 'Erika'), ('Erika', 'sister', 'Laura')]}, {('Antonio', 'daughter', 'Erika'): [('Antonio', 'son', 'Kevin'), ('Kevin', 'sister', 'Erika')]}]
['son', 'son', 'sister', 'sister']