You're given a sentence and your task is to classify whether the sentence is acceptable or not. Any sentence which is grammatically correct, has a naturalistic text, is written by a native speaker and which minimizes superfluous content is acceptable, otherwise unacceptable. If the sentence is acceptable then write "acceptable", otherwise "unacceptable".

Q: I know which guys you've dated, but I don't know which guys you haven't.

A: acceptable
****
Q: My mother baked me a birthday cake.

A: acceptable
****
Q: We believed it to try to leave the country.

A:
unacceptable
****