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 would ove dinner because you have a little rice left .

SOLUTION: You would post dinner because you have a little rice left .

PROBLEM: You can embarrass a friend to upset a secret .

SOLUTION: You can trust a friend to forge a romance .

PROBLEM: A super van is made with radioactive materials mixed with ordinary explosives .

SOLUTION:
A dirty bomb is made with radioactive materials mixed with ordinary explosives.