[Robert] is an engineer who loves to take his son [Allan] to the science museum to help him learn about the world [Roberto] liked to visit his uncle [Robert]. They played ball together a lot. [Pedro] was delighted to watch his son [Roberto] steal third base in the Championship baseball game. [Allan]'s sister, [Michelle], bought movie tickets at a discount rate.
('Pedro', 'Michelle')
[Pedro] was delighted to watch his son [Roberto] steal third base in the Championship baseball game. [Roberto] liked to visit his uncle [Robert]. They played ball together a lot. [Robert] is an engineer who loves to take his son [Allan] to the science museum to help him learn about the world [Allan]'s sister, [Michelle], bought movie tickets at a discount rate.
[{('Pedro', 'niece', 'Michelle'): [('Pedro', 'brother', 'Robert'), ('Robert', 'daughter', 'Michelle')]}, {('Robert', 'daughter', 'Michelle'): [('Robert', 'son', 'Allan'), ('Allan', 'sister', 'Michelle')]}, {('Pedro', 'brother', 'Robert'): [('Pedro', 'son', 'Roberto'), ('Roberto', 'uncle', 'Robert')]}]
['son', 'uncle', 'son', 'sister']