[Wesley] is one of [Cindy]'s brothers. They have lots of fun together. [Wesley] and his sister [Lynn] are going for a walk. [Cindy] took her younger sister [David] to the carnival last weekend.
('David', 'Lynn')
[Cindy] took her younger sister [David] to the carnival last weekend. [Wesley] is one of [Cindy]'s brothers. They have lots of fun together. [Wesley] and his sister [Lynn] are going for a walk.
[{('David', 'sister', 'Lynn'): [('David', 'brother', 'Wesley'), ('Wesley', 'sister', 'Lynn')]}, {('David', 'brother', 'Wesley'): [('David', 'sister', 'Cindy'), ('Cindy', 'brother', 'Wesley')]}]
['sister', 'brother', 'sister']