[Beverly], [Robert]'s sister, was helping him around the house. Her brother [Pedro] was helping out too. [Antonio] took his son [Bernardo] to the park on Saturday and while there they saw [Antonio]'s brother [Robert].
('Bernardo', 'Pedro')
[Antonio] took his son [Bernardo] to the park on Saturday and while there they saw [Antonio]'s brother [Robert]. [Beverly], [Robert]'s sister, was helping him around the house. Her brother [Pedro] was helping out too.
[{('Bernardo', 'uncle', 'Pedro'): [('Bernardo', 'father', 'Antonio'), ('Antonio', 'brother', 'Pedro')]}, {('Antonio', 'brother', 'Pedro'): [('Antonio', 'brother', 'Robert'), ('Robert', 'brother', 'Pedro')]}, {('Robert', 'brother', 'Pedro'): [('Robert', 'sister', 'Beverly'), ('Beverly', 'brother', 'Pedro')]}]
['father', 'brother', 'sister', 'brother']