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".

It was John's that I stole bike.
unacceptable

The more geniuses John meets, the angrier he gets.
acceptable

Lenin believes the Tsar to be a power hungry dictator.

acceptable