[Pedro]'s daughter, [Cheryl], was glad to have time for lunch with her mom, [Dorothy]. [James], [Dorothy]'s son, did n't have the time. [James] went fishing with is uncle [Antonio] last weekend.
('Pedro', 'Antonio')
[Pedro]'s daughter, [Cheryl], was glad to have time for lunch with her mom, [Dorothy]. [James], [Dorothy]'s son, did n't have the time. [James] went fishing with is uncle [Antonio] last weekend.
[{('Pedro', 'brother', 'Antonio'): [('Pedro', 'son', 'James'), ('James', 'uncle', 'Antonio')]}, {('Pedro', 'son', 'James'): [('Pedro', 'daughter', 'Cheryl'), ('Cheryl', 'brother', 'James')]}, {('Cheryl', 'brother', 'James'): [('Cheryl', 'mother', 'Dorothy'), ('Dorothy', 'son', 'James')]}]
['daughter', 'mother', 'son', 'uncle']