[David] and her sister [Cindy] played golf together. [David] won easily. [Wesley] asked his sister, [Cindy], if she would babysit his son, [Theodore], for the night.
('Theodore', 'David')
[Wesley] asked his sister, [Cindy], if she would babysit his son, [Theodore], for the night. [David] and her sister [Cindy] played golf together. [David] won easily.
[{('Theodore', 'aunt', 'David'): [('Theodore', 'father', 'Wesley'), ('Wesley', 'sister', 'David')]}, {('Wesley', 'sister', 'David'): [('Wesley', 'sister', 'Cindy'), ('Cindy', 'sister', 'David')]}]
['father', 'sister', 'sister']