[Nancy] took her daughter [Linda] to see her very first ballet performance. [Nancy] took her father [Clarence] to watch a movie together.
('Linda', 'Clarence')
[Nancy] took her daughter [Linda] to see her very first ballet performance. [Nancy] took her father [Clarence] to watch a movie together.
[{('Linda', 'grandfather', 'Clarence'): [('Linda', 'mother', 'Nancy'), ('Nancy', 'father', 'Clarence')]}]
['mother', 'father']