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 grape in a lunch box.
You are likely to find a number in a result box .

A key can be a framework to a problem .
A key can be a solution to a problem.

A customer wants to eat cat food .

A le wants to eat cat food .