[Lynn] made sure that her sister [Cindy] would be able to make it to the restaurant on Saturday. [Lynn] was excited to have her son [Don] spend some time with [Cindy]. [Cindy] took her sister [David] out for dinner to celebrate her birthday.
('David', 'Don')
[Cindy] took her sister [David] out for dinner to celebrate her birthday. [Lynn] made sure that her sister [Cindy] would be able to make it to the restaurant on Saturday. [Lynn] was excited to have her son [Don] spend some time with [Cindy].
[{('David', 'nephew', 'Don'): [('David', 'sister', 'Lynn'), ('Lynn', 'son', 'Don')]}, {('David', 'sister', 'Lynn'): [('David', 'sister', 'Cindy'), ('Cindy', 'sister', 'Lynn')]}]
['sister', 'sister', 'son']