[Ashley] had to pick up her grandson [Milton] and his sister, [Jennifer], from school today.
('Ashley', 'Jennifer')
[Ashley] had to pick up her grandson [Milton] and his sister, [Jennifer], from school today.
[{('Ashley', 'granddaughter', 'Jennifer'): [('Ashley', 'grandson', 'Milton'), ('Milton', 'sister', 'Jennifer')]}]
['grandson', 'sister']