[Joshua] liked to visit his mom [Frances] with his son [Joseph]. Sometimes [Joseph]'s sister [Dolores] came, too.
('Frances', 'Dolores')
[Joshua] liked to visit his mom [Frances] with his son [Joseph]. Sometimes [Joseph]'s sister [Dolores] came, too.
[{('Frances', 'granddaughter', 'Dolores'): [('Frances', 'son', 'Joshua'), ('Joshua', 'daughter', 'Dolores')]}, {('Joshua', 'daughter', 'Dolores'): [('Joshua', 'son', 'Joseph'), ('Joseph', 'sister', 'Dolores')]}]
['son', 'son', 'sister']