[Frances] has a son named [Joshua]. [Joshua]'s son [Joseph] entered rehab for the ninth time at the age of thirty. [Joseph] went to pick up his uncle from the airport with his uncle's wife [Cindy].
('Frances', 'Cindy')
[Frances] has a son named [Joshua]. [Joshua]'s son [Joseph] entered rehab for the ninth time at the age of thirty. [Joseph] went to pick up his uncle from the airport with his uncle's wife [Cindy].
[{('Frances', 'daughter', 'Cindy'): [('Frances', 'son', 'Joshua'), ('Joshua', 'sister', 'Cindy')]}, {('Joshua', 'sister', 'Cindy'): [('Joshua', 'son', 'Joseph'), ('Joseph', 'aunt', 'Cindy')]}]
['son', 'son', 'aunt']