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 read the newspaper because you want to know about the financial markets.

SOLUTION: You would rate the newspaper because you want to Know about the financial markets .

PROBLEM: Water is composed of hydrogen and oxygen.

SOLUTION: ice is composed of hydrogen and oxygen .

PROBLEM: You are likely to find a pink bag in a sandwich store .

SOLUTION:
You are powerless to find a shoulder bag in a department store .