[Nancy] and her daughter [Heidi] went out for ice cream. [Nancy] got a cone and [Heidi] got a sundae. [Nancy] took her daughter [Linda] to see her very first ballet performance.
('Linda', 'Heidi')
[Nancy] took her daughter [Linda] to see her very first ballet performance. [Nancy] and her daughter [Heidi] went out for ice cream. [Nancy] got a cone and [Heidi] got a sundae.
[{('Linda', 'sister', 'Heidi'): [('Linda', 'mother', 'Nancy'), ('Nancy', 'daughter', 'Heidi')]}]
['mother', 'daughter']