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: Someone 's aunt Must play the lawyer .

SOLUTION: Someone 's aunt z play the queen .

PROBLEM: People can gather money .

SOLUTION: People can spend money.

PROBLEM: If your brakes fail your car may end up looking like a butchers shop.

SOLUTION:
If your brakes fail your rental may end up looking like a butchers shop .