[Lena] and her brother [Joshua] are taking [Lena]'s son [Irvin] to the park. [Cindy] invited her nephew, [Irvin], over for dinner.
('Joshua', 'Cindy')
[Lena] and her brother [Joshua] are taking [Lena]'s son [Irvin] to the park. [Cindy] invited her nephew, [Irvin], over for dinner.
[{('Joshua', 'sister', 'Cindy'): [('Joshua', 'sister', 'Lena'), ('Lena', 'sister', 'Cindy')]}, {('Lena', 'sister', 'Cindy'): [('Lena', 'son', 'Irvin'), ('Irvin', 'aunt', 'Cindy')]}]
['sister', 'son', 'aunt']