[Marie] went on a vacation with her brother [Antonio]. [Allan] asked his father, [Robert], to help him with his math homework. [Robert] could n't, because he was lousy at math himself. [Mario] id [Marie]'s only child. They have a really strong bond. They spend a lot of their free time together. [Robert] took his son [Mario] for boxing lessons. He felt the boy needed to toughen up.
('Allan', 'Antonio')
[Allan] asked his father, [Robert], to help him with his math homework. [Robert] could n't, because he was lousy at math himself. [Robert] took his son [Mario] for boxing lessons. He felt the boy needed to toughen up. [Mario] id [Marie]'s only child. They have a really strong bond. They spend a lot of their free time together. [Marie] went on a vacation with her brother [Antonio].
[{('Allan', 'uncle', 'Antonio'): [('Allan', 'mother', 'Marie'), ('Marie', 'brother', 'Antonio')]}, {('Allan', 'mother', 'Marie'): [('Allan', 'brother', 'Mario'), ('Mario', 'mother', 'Marie')]}, {('Allan', 'brother', 'Mario'): [('Allan', 'father', 'Robert'), ('Robert', 'son', 'Mario')]}]
['father', 'son', 'mother', 'brother']