[Joshua] and his sister [Cindy] are going for a walk. [Frances]'s son [Wesley] and son [Joshua] went to the park together to play.
('Wesley', 'Cindy')
[Frances]'s son [Wesley] and son [Joshua] went to the park together to play. [Joshua] and his sister [Cindy] are going for a walk.
[{('Wesley', 'sister', 'Cindy'): [('Wesley', 'mother', 'Frances'), ('Frances', 'daughter', 'Cindy')]}, {('Frances', 'daughter', 'Cindy'): [('Frances', 'son', 'Joshua'), ('Joshua', 'sister', 'Cindy')]}]
['mother', 'son', 'sister']