[Nancy] asked her father [Clarence] to take her to school. [Clarence] said he'd take her in a few minutes. [Nancy] took her daughter [Louise] to see her very first ballet performance.
('Louise', 'Clarence')
[Nancy] took her daughter [Louise] to see her very first ballet performance. [Nancy] asked her father [Clarence] to take her to school. [Clarence] said he'd take her in a few minutes.
[{('Louise', 'grandfather', 'Clarence'): [('Louise', 'mother', 'Nancy'), ('Nancy', 'father', 'Clarence')]}]
['mother', 'father']