[Antonio] went to pick up his son [Kevin] from the baseball practice. [Louis] was in the backyard throwing the baseball around with his uncle [Kevin]. [Louis] and his brother [Robert] liked to eat pizza but [Robert]'s sister [Dorothy] liked to eat tacos.
('Antonio', 'Dorothy')
[Antonio] went to pick up his son [Kevin] from the baseball practice. [Louis] was in the backyard throwing the baseball around with his uncle [Kevin]. [Louis] and his brother [Robert] liked to eat pizza but [Robert]'s sister [Dorothy] liked to eat tacos.
[{('Antonio', 'sister', 'Dorothy'): [('Antonio', 'brother', 'Robert'), ('Robert', 'sister', 'Dorothy')]}, {('Antonio', 'brother', 'Robert'): [('Antonio', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Antonio', 'brother', 'Louis'): [('Antonio', 'son', 'Kevin'), ('Kevin', 'uncle', 'Louis')]}]
['son', 'uncle', 'brother', 'sister']