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 wall in a classroom.
You are likely to mark a wall in a classroom .

Because with gas you can wander to the store .
Because with gas you can fuel to the store .

A mother and her child can meet to the park together .

A mother and her child can go to the park together.