[Pedro] made a sandwich for his son [Jeffrey]. [Jeffrey]'s brother [James] ate an apple instead. [Pedro] is a man with a son named [Jeffrey]. [Antonio] invited his nephew [James] to go hunting with him on Saturday. [James] said he would love to go with him.
('Jeffrey', 'Antonio')
[Pedro] is a man with a son named [Jeffrey]. [Pedro] made a sandwich for his son [Jeffrey]. [Jeffrey]'s brother [James] ate an apple instead. [Antonio] invited his nephew [James] to go hunting with him on Saturday. [James] said he would love to go with him.
[{('Jeffrey', 'uncle', 'Antonio'): [('Jeffrey', 'father', 'Pedro'), ('Pedro', 'brother', 'Antonio')]}, {('Pedro', 'brother', 'Antonio'): [('Pedro', 'son', 'James'), ('James', 'uncle', 'Antonio')]}, {('Pedro', 'son', 'James'): [('Pedro', 'son', 'Jeffrey'), ('Jeffrey', 'brother', 'James')]}]
['father', 'son', 'brother', 'uncle']