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.

[EX Q]: If you want to walk in the rain, bring an umbrella.
[EX A]: If you want to walk in the exhibition , bring an assignment .

[EX Q]: You are likely to drag a hair in your bed .
[EX A]: You are likely to find a meteor in your bed .

[EX Q]: A snail can sing a song .
[EX A]:
A bird can sing a song.