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