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 buying planes is you have to spend money .

SOLUTION: The effect of buying assets is you have to develop money .

PROBLEM: People can use the internet to compare prices on travel goals .

SOLUTION: People can catch the internet to compare prices on travel tickets .

PROBLEM: The dogs ate the bag .

SOLUTION:
The dogs ate the chip .