[Cindy] read her son [Richard] a bedtime story every night. [James] took his daughter, [Cindy], to the father daughter dance at church. [Richard] loves visiting his aunt [David] over the weekends.
('James', 'David')
[James] took his daughter, [Cindy], to the father daughter dance at church. [Cindy] read her son [Richard] a bedtime story every night. [Richard] loves visiting his aunt [David] over the weekends.
[{('James', 'daughter', 'David'): [('James', 'daughter', 'Cindy'), ('Cindy', 'sister', 'David')]}, {('Cindy', 'sister', 'David'): [('Cindy', 'son', 'Richard'), ('Richard', 'aunt', 'David')]}]
['daughter', 'son', 'aunt']