[Hugh] took his sister [Cindy] to the movies with him to see the new Star Wars film. [Anna] and her mother [Cindy] had a coffee date, and [Anna]'s sister [Wilhelmina] showed up in the middle of it.
('Hugh', 'Wilhelmina')
[Hugh] took his sister [Cindy] to the movies with him to see the new Star Wars film. [Anna] and her mother [Cindy] had a coffee date, and [Anna]'s sister [Wilhelmina] showed up in the middle of it.
[{('Hugh', 'niece', 'Wilhelmina'): [('Hugh', 'sister', 'Cindy'), ('Cindy', 'daughter', 'Wilhelmina')]}, {('Cindy', 'daughter', 'Wilhelmina'): [('Cindy', 'daughter', 'Anna'), ('Anna', 'sister', 'Wilhelmina')]}]
['sister', 'daughter', 'sister']