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: Brenda haggled Molly.

A: unacceptable
****
Q: We proclaimed to the public John to be a hero.

A: unacceptable
****
Q: It was believed that the earth was round.

A:
acceptable
****