[Tracy] wanted her son [Bernardo] to pick up her medicine at the local pharmacy. [Bernardo] was working so he asked his brother [Bobby] if would do it and he said yes. [Tracy]'s nephew, [Jeffrey], brought her lunch at work. [Jeffrey] asked his father [Pedro] if he could have a video game and he said okay.
('Pedro', 'Bobby')
[Jeffrey] asked his father [Pedro] if he could have a video game and he said okay. [Tracy]'s nephew, [Jeffrey], brought her lunch at work. [Tracy] wanted her son [Bernardo] to pick up her medicine at the local pharmacy. [Bernardo] was working so he asked his brother [Bobby] if would do it and he said yes.
[{('Pedro', 'nephew', 'Bobby'): [('Pedro', 'sister', 'Tracy'), ('Tracy', 'son', 'Bobby')]}, {('Tracy', 'son', 'Bobby'): [('Tracy', 'son', 'Bernardo'), ('Bernardo', 'brother', 'Bobby')]}, {('Pedro', 'sister', 'Tracy'): [('Pedro', 'son', 'Jeffrey'), ('Jeffrey', 'aunt', 'Tracy')]}]
['son', 'aunt', 'son', 'brother']