[Travis] and his grandmother [Ashley] went to the ice cream shop/ [Travis]'s sister, [Charlotte], participated in the dance contest.
('Ashley', 'Charlotte')
[Travis] and his grandmother [Ashley] went to the ice cream shop/ [Travis]'s sister, [Charlotte], participated in the dance contest.
[{('Ashley', 'granddaughter', 'Charlotte'): [('Ashley', 'grandson', 'Travis'), ('Travis', 'sister', 'Charlotte')]}]
['grandson', 'sister']