[Nancy] picked up her son [Jeff] from the mall [Jeff] and his sister [Linda] went to brunch today at the new diner.
('Linda', 'Nancy')
[Jeff] and his sister [Linda] went to brunch today at the new diner. [Nancy] picked up her son [Jeff] from the mall
[{('Linda', 'mother', 'Nancy'): [('Linda', 'brother', 'Jeff'), ('Jeff', 'mother', 'Nancy')]}]
['brother', 'mother']