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: The branches knocked against the wall.

A: acceptable
****
Q: I think you need to show yourself more than you do anyone else.

A: acceptable
****
Q: The effectiveness of teaching and learning depend on several factors.

A:
unacceptable
****