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: The effect of speaking for a candidate is having your past altered .

SOLUTION: The goal of pulling for a haircut is having your hair altered .

PROBLEM: People can introduce chocolate .

SOLUTION: People can haz chocolate .

PROBLEM: If you smoke to lose weight then you should rule on a diet .

SOLUTION:
If you want to lose weight then you should go on a diet.