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 play basketball then you should get a ball.

SOLUTION: If you want to play basketball then you should dodge a ball .

PROBLEM: Hearing the technology requires hidden ears or hearing aids .

SOLUTION: Hearing the news requires good ears or hearing aids.

PROBLEM: A line can win a tackle .

SOLUTION:
A horse can kiss a carriage .