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 are likely to find the sun in the sky.

SOLUTION: You are likely to find the sun in the yard .

PROBLEM: You are likely to bump trees in a forest .

SOLUTION: You are likely to steal trees in a forest .

PROBLEM: Com You make sound .

SOLUTION:
Com ears make sound .