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 would see a band because you want to listen to music.
You would allow a band because you want to listen to music .

People can introduce chocolate .
People can haz chocolate .

You are likely to surprise a mouse in the basement .

You are likely to find a voice in the basement .