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: While Truman doesn't want to visit every city, he does Barcelona.

A: acceptable
****
Q: Where did the policeman meet several young students?

A: acceptable
****
Q: I've never known a smarter dog than Fido.

A:
acceptable
****