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.

You are likely to find a shark around in ocean.
You are likely to seem a shark around in ocean .

People can dream that they are in a better station .
People can dream that they are in a better place.

You would start a ghost or a fire because you want to be punished .

You would start a flame or a fire because you want to be warmed.