[Antonio] watched his daughter [Erika] playing basketball. [Erika] threw the ball to her brother [Kevin] who made the basket. [Pedro]'s father, [Harold], bought him some ice cream. [Harold] went to pick up his son [Antonio] from the baseball practice.
('Pedro', 'Kevin')
[Pedro]'s father, [Harold], bought him some ice cream. [Harold] went to pick up his son [Antonio] from the baseball practice. [Antonio] watched his daughter [Erika] playing basketball. [Erika] threw the ball to her brother [Kevin] who made the basket.
[{('Pedro', 'nephew', 'Kevin'): [('Pedro', 'brother', 'Antonio'), ('Antonio', 'son', 'Kevin')]}, {('Pedro', 'brother', 'Antonio'): [('Pedro', 'father', 'Harold'), ('Harold', 'son', 'Antonio')]}, {('Antonio', 'son', 'Kevin'): [('Antonio', 'daughter', 'Erika'), ('Erika', 'brother', 'Kevin')]}]
['father', 'son', 'daughter', 'brother']