[Tracy] borrowed some money from her brother [Robert]. [Tracy] and her brother [Pedro] went to the diner to eat yummy food together. [John] and his brother [Allan] went to the arcade. They had a wonderful time. [Robert] who is [Allan]'s father grounded [Allan] after finding out what [Allan] had done at school.
('Pedro', 'John')
[Tracy] and her brother [Pedro] went to the diner to eat yummy food together. [Tracy] borrowed some money from her brother [Robert]. [Robert] who is [Allan]'s father grounded [Allan] after finding out what [Allan] had done at school. [John] and his brother [Allan] went to the arcade. They had a wonderful time.
[{('Pedro', 'nephew', 'John'): [('Pedro', 'brother', 'Robert'), ('Robert', 'son', 'John')]}, {('Pedro', 'brother', 'Robert'): [('Pedro', 'sister', 'Tracy'), ('Tracy', 'brother', 'Robert')]}, {('Robert', 'son', 'John'): [('Robert', 'son', 'Allan'), ('Allan', 'brother', 'John')]}]
['sister', 'brother', 'son', 'brother']