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: You can use a radio to listen to Web programmes .

SOLUTION: You can clone a ham to listen to talk shows .

PROBLEM: You can use a bus stop to wait for a bus.

SOLUTION: You can use a bus stop to seek for a bus .

PROBLEM: Rain falls from clouds.

SOLUTION:
Storm falls from clouds .