- - 'A cheerful little bird is sitting here singing.'
- - 'There is a little bird in the cage.'
- - 'A cheerful little bird is sitting here singing.'
+ - [BIRD_UNCAGED, 'A cheerful little bird is sitting here singing.']
+ - [BIRD_CAGED, 'There is a little bird in the cage.']
+ - [BIRD_FOREST_UNCAGED, 'A cheerful little bird is sitting here singing.']