[Harold] loves to spend time with his 5 year old grandson [Aaron]. [Aaron]'s brother, [Bernardo], brought the car over to help him. [Antonio] played catch with his son [Bobby]. [Antonio]'s other son [Bernardo] does n't play baseball.
('Harold', 'Bobby')
[Harold] loves to spend time with his 5 year old grandson [Aaron]. [Aaron]'s brother, [Bernardo], brought the car over to help him. [Antonio] played catch with his son [Bobby]. [Antonio]'s other son [Bernardo] does n't play baseball.
[{('Harold', 'grandson', 'Bobby'): [('Harold', 'grandson', 'Bernardo'), ('Bernardo', 'brother', 'Bobby')]}, {('Harold', 'grandson', 'Bernardo'): [('Harold', 'grandson', 'Aaron'), ('Aaron', 'brother', 'Bernardo')]}, {('Bernardo', 'brother', 'Bobby'): [('Bernardo', 'father', 'Antonio'), ('Antonio', 'son', 'Bobby')]}]
['grandson', 'brother', 'father', 'son']