[Wesley] decided to take his son, [Irvin], on a ski vacation. [Cindy] took her younger sister [Lynn] to the carnival last weekend. [Lynn] ca n't wait to go to Australia with her nephew [Irvin].
('Wesley', 'Cindy')
[Wesley] decided to take his son, [Irvin], on a ski vacation. [Lynn] ca n't wait to go to Australia with her nephew [Irvin]. [Cindy] took her younger sister [Lynn] to the carnival last weekend.
[{('Wesley', 'sister', 'Cindy'): [('Wesley', 'sister', 'Lynn'), ('Lynn', 'sister', 'Cindy')]}, {('Wesley', 'sister', 'Lynn'): [('Wesley', 'son', 'Irvin'), ('Irvin', 'aunt', 'Lynn')]}]
['son', 'aunt', 'sister']