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: People can gather money .

SOLUTION: People can spend money.

PROBLEM: You are likely to find a chess attack in a chess game .

SOLUTION: You are likely to find a match king in a chess restaurant .

PROBLEM: Wars can destroy shelter for animals , such as grass .

SOLUTION:
Wars can destroy food for animals, such as grass.