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 snowball is used to defend oneself against an alert .

SOLUTION: A chain is used to store oneself against an attack .

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: You are likely to admire literature in books and debates .

SOLUTION:
You are likely to develop literature in books and magazines .