[Erika] loves her brother [Aaron]. [Kevin] asked his father, [Antonio], to help him with his math homework. [Antonio] could n't, because he was lousy at math himself. [Antonio]'s son [Kevin] entered rehab for the ninth time at the age of thirty. [Antonio] wanted his son, [Aaron], to go fishing with him.
('Erika', 'Antonio')
[Erika] loves her brother [Aaron]. [Antonio] wanted his son, [Aaron], to go fishing with him. [Antonio]'s son [Kevin] entered rehab for the ninth time at the age of thirty. [Kevin] asked his father, [Antonio], to help him with his math homework. [Antonio] could n't, because he was lousy at math himself.
[{('Erika', 'father', 'Antonio'): [('Erika', 'brother', 'Kevin'), ('Kevin', 'father', 'Antonio')]}, {('Erika', 'brother', 'Kevin'): [('Erika', 'brother', 'Aaron'), ('Aaron', 'brother', 'Kevin')]}, {('Aaron', 'brother', 'Kevin'): [('Aaron', 'father', 'Antonio'), ('Antonio', 'son', 'Kevin')]}]
['brother', 'father', 'son', 'father']