[Lena] has been waiting around all day for her son, [Chris]. [Lynn] asked her two sisters [Lena] and [David] if they were free for coffee this coming weekend.
('David', 'Chris')
[Lynn] asked her two sisters [Lena] and [David] if they were free for coffee this coming weekend. [Lena] has been waiting around all day for her son, [Chris].
[{('David', 'nephew', 'Chris'): [('David', 'sister', 'Lena'), ('Lena', 'son', 'Chris')]}, {('David', 'sister', 'Lena'): [('David', 'sister', 'Lynn'), ('Lynn', 'sister', 'Lena')]}]
['sister', 'sister', 'son']