[Robert] and her sister [Tracy] decided to take a trip to Mexico together. [James]'s brother, [Jeffrey], brought the car over to help him. [Robert] and his sister [Dorothy] were fighting. [James], [Dorothy]'s son, got them to put aside their differences and make up.
('Tracy', 'Jeffrey')
[Robert] and her sister [Tracy] decided to take a trip to Mexico together. [Robert] and his sister [Dorothy] were fighting. [James], [Dorothy]'s son, got them to put aside their differences and make up. [James]'s brother, [Jeffrey], brought the car over to help him.
[{('Tracy', 'nephew', 'Jeffrey'): [('Tracy', 'sister', 'Dorothy'), ('Dorothy', 'son', 'Jeffrey')]}, {('Dorothy', 'son', 'Jeffrey'): [('Dorothy', 'son', 'James'), ('James', 'brother', 'Jeffrey')]}, {('Tracy', 'sister', 'Dorothy'): [('Tracy', 'brother', 'Robert'), ('Robert', 'sister', 'Dorothy')]}]
['brother', 'sister', 'son', 'brother']