TASK DEFINITION: Given a sentence, generate a new sentence by performing small changes on the sentence. Here, make sure that the changes are semantically related and syntactically similar to the input. And the generated sentence should have high commonsense plausibility, that is to have reasonable probability of it being true.
PROBLEM: If you want to take a course then you should go to school.

SOLUTION: If you want to take a course then you should recommend to school .

PROBLEM: If you want to read a typo , go to a bookstore .

SOLUTION: If you want to read a book, go to a bookstore.

PROBLEM: If you want to kill war then you should join the army .

SOLUTION:
If you want to try war then you should join the army .