TASK DEFINITION: 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".
PROBLEM: What did Becky buy?

SOLUTION: acceptable

PROBLEM: It was John's that I stole bike.

SOLUTION: unacceptable

PROBLEM: Which book he read the book was that one.

SOLUTION:
unacceptable