[David] and her sister [Cindy] played golf together. [David] won easily. [David] asked her mother, [Frances], to help her with her math homework. [Frances] said she would, as soon as she put her son [Wesley] to bed.
('Cindy', 'Wesley')
[David] and her sister [Cindy] played golf together. [David] won easily. [David] asked her mother, [Frances], to help her with her math homework. [Frances] said she would, as soon as she put her son [Wesley] to bed.
[{('Cindy', 'brother', 'Wesley'): [('Cindy', 'sister', 'David'), ('David', 'brother', 'Wesley')]}, {('David', 'brother', 'Wesley'): [('David', 'mother', 'Frances'), ('Frances', 'son', 'Wesley')]}]
['sister', 'mother', 'son']