[Joshua] met his mother, [Frances], and his sister, [David] for tea last Wednesday afternoon. [David] had to leave early to pick up her daughter, [Marie], from school.
('Frances', 'Marie')
[Joshua] met his mother, [Frances], and his sister, [David] for tea last Wednesday afternoon. [David] had to leave early to pick up her daughter, [Marie], from school.
[{('Frances', 'granddaughter', 'Marie'): [('Frances', 'daughter', 'David'), ('David', 'daughter', 'Marie')]}, {('Frances', 'daughter', 'David'): [('Frances', 'son', 'Joshua'), ('Joshua', 'sister', 'David')]}]
['son', 'sister', 'daughter']