[Cindy] invited her son [Richard] and daughter [Natasha] to dinner. [Cindy]'s son [Wayne] attended a different dinner party.
('Natasha', 'Wayne')
[Cindy] invited her son [Richard] and daughter [Natasha] to dinner. [Cindy]'s son [Wayne] attended a different dinner party.
[{('Natasha', 'brother', 'Wayne'): [('Natasha', 'brother', 'Richard'), ('Richard', 'brother', 'Wayne')]}, {('Richard', 'brother', 'Wayne'): [('Richard', 'mother', 'Cindy'), ('Cindy', 'son', 'Wayne')]}]
['brother', 'mother', 'son']