[Allan]'s mother, [Marie], was worried about him. He had n't been eating. [Marie] borrowed some money from her brother [Pedro]. [Marie] asked her husband, [Robert], to help her son, [Allan] with his homework.
('Robert', 'Pedro')
[Marie] asked her husband, [Robert], to help her son, [Allan] with his homework. [Allan]'s mother, [Marie], was worried about him. He had n't been eating. [Marie] borrowed some money from her brother [Pedro].
[{('Robert', 'brother', 'Pedro'): [('Robert', 'son', 'Allan'), ('Allan', 'uncle', 'Pedro')]}, {('Allan', 'uncle', 'Pedro'): [('Allan', 'mother', 'Marie'), ('Marie', 'brother', 'Pedro')]}, {('Robert', 'son', 'Allan'): [('Robert', 'wife', 'Marie'), ('Marie', 'son', 'Allan')]}]
['wife', 'son', 'mother', 'brother']