[Marie] picked up her brother [Pedro] from the airport. Then they went to her sister [Dorothy]'s house for lunch. [Antonio] and his brother [Pedro] went to the boxing match. [Beverly] was upset her brother [Antonio] did n't invite her.
('Beverly', 'Dorothy')
[Antonio] and his brother [Pedro] went to the boxing match. [Beverly] was upset her brother [Antonio] did n't invite her. [Marie] picked up her brother [Pedro] from the airport. Then they went to her sister [Dorothy]'s house for lunch.
[{('Beverly', 'sister', 'Dorothy'): [('Beverly', 'sister', 'Marie'), ('Marie', 'sister', 'Dorothy')]}, {('Beverly', 'sister', 'Marie'): [('Beverly', 'brother', 'Antonio'), ('Antonio', 'sister', 'Marie')]}, {('Antonio', 'sister', 'Marie'): [('Antonio', 'brother', 'Pedro'), ('Pedro', 'sister', 'Marie')]}]
['brother', 'brother', 'sister', 'sister']