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: A butterfly can deliver a win in a special school .

SOLUTION: A education can put a child in a black school .

PROBLEM: Expensive chocolate melts at mid temperature .

SOLUTION: Expensive chocolate melts at face temperature .

PROBLEM: You are set to find a rented apartment in a city .

SOLUTION:
You are likely to access a protected apartment in a castle .