[Mario] borrowed some money from his sister [Elsie]. [Marie] took her daughter [Elsie] to see her very first ballet performance. [Robert] and his wife, [Marie], took [Robert]'s daughter [Lizzie] to the park for a nice day in the sun.
('Mario', 'Lizzie')
[Mario] borrowed some money from his sister [Elsie]. [Marie] took her daughter [Elsie] to see her very first ballet performance. [Robert] and his wife, [Marie], took [Robert]'s daughter [Lizzie] to the park for a nice day in the sun.
[{('Mario', 'sister', 'Lizzie'): [('Mario', 'mother', 'Marie'), ('Marie', 'daughter', 'Lizzie')]}, {('Marie', 'daughter', 'Lizzie'): [('Marie', 'husband', 'Robert'), ('Robert', 'daughter', 'Lizzie')]}, {('Mario', 'mother', 'Marie'): [('Mario', 'sister', 'Elsie'), ('Elsie', 'mother', 'Marie')]}]
['sister', 'mother', 'husband', 'daughter']