[Natasha]'s mother, [Cindy], had finished making dinner. [Cindy] told [Natasha] to call [Natasha]'s sister, [Wilhelmina], to come set the table. [Richard] surprised his wife, [Wilhelmina], with a party to celebrate their anniversary.
('Richard', 'Cindy')
[Richard] surprised his wife, [Wilhelmina], with a party to celebrate their anniversary. [Natasha]'s mother, [Cindy], had finished making dinner. [Cindy] told [Natasha] to call [Natasha]'s sister, [Wilhelmina], to come set the table.
[{('Richard', 'mother-in-law', 'Cindy'): [('Richard', 'wife', 'Wilhelmina'), ('Wilhelmina', 'mother', 'Cindy')]}, {('Wilhelmina', 'mother', 'Cindy'): [('Wilhelmina', 'sister', 'Natasha'), ('Natasha', 'mother', 'Cindy')]}]
['wife', 'sister', 'mother']