[Cindy] asked her son [Pete] to help her fix her television. [Lynn] took her son [Joseph] to the mall to shop for school clothes. [Joseph] has an aunt named [Cindy].
('Lynn', 'Pete')
[Lynn] took her son [Joseph] to the mall to shop for school clothes. [Joseph] has an aunt named [Cindy]. [Cindy] asked her son [Pete] to help her fix her television.
[{('Lynn', 'nephew', 'Pete'): [('Lynn', 'sister', 'Cindy'), ('Cindy', 'son', 'Pete')]}, {('Lynn', 'sister', 'Cindy'): [('Lynn', 'son', 'Joseph'), ('Joseph', 'aunt', 'Cindy')]}]
['son', 'aunt', 'son']