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: An effect can leave a hole .

SOLUTION: An owl can stop a dart .

PROBLEM: You are likely to find a mouse in a computer store.

SOLUTION: You are likely to find a mouse in a city store .

PROBLEM: You are motivated to find a stop in a busy street .

SOLUTION:
You are pleased to find a stop in a busy street .