[Allan] liked to play games with his sister, [Angelica]. [Marie]'s son [Allan] and brother [Antonio] came to her birthday party last weekend. [Angelica] was playing in the sandbox with her brother [Ronald].
('Antonio', 'Ronald')
[Marie]'s son [Allan] and brother [Antonio] came to her birthday party last weekend. [Allan] liked to play games with his sister, [Angelica]. [Angelica] was playing in the sandbox with her brother [Ronald].
[{('Antonio', 'nephew', 'Ronald'): [('Antonio', 'sister', 'Marie'), ('Marie', 'son', 'Ronald')]}, {('Marie', 'son', 'Ronald'): [('Marie', 'son', 'Allan'), ('Allan', 'brother', 'Ronald')]}, {('Allan', 'brother', 'Ronald'): [('Allan', 'sister', 'Angelica'), ('Angelica', 'brother', 'Ronald')]}]
['sister', 'son', 'sister', 'brother']