[Ronald]'s uncle, [Pedro], is finally getting help for his alcoholism. [Robert] and his brother [Antonio] went to the park. They threw a ball around and played with their dog. [Mario] went to the baseball game with his brother [Ronald]. [Robert] is so proud of his son. [Mario] is the son's name.
('Antonio', 'Pedro')
[Robert] and his brother [Antonio] went to the park. They threw a ball around and played with their dog. [Robert] is so proud of his son. [Mario] is the son's name. [Mario] went to the baseball game with his brother [Ronald]. [Ronald]'s uncle, [Pedro], is finally getting help for his alcoholism.
[{('Antonio', 'brother', 'Pedro'): [('Antonio', 'brother', 'Robert'), ('Robert', 'brother', 'Pedro')]}, {('Robert', 'brother', 'Pedro'): [('Robert', 'son', 'Ronald'), ('Ronald', 'uncle', 'Pedro')]}, {('Robert', 'son', 'Ronald'): [('Robert', 'son', 'Mario'), ('Mario', 'brother', 'Ronald')]}]
['brother', 'son', 'brother', 'uncle']