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.

People can gather money .
People can spend money.

You are likely to drag a hair in your bed .
You are likely to find a meteor in your bed .

Some bridges is made of lime .

Some bridges is made of stone.