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 pencil is discarded for writing .

SOLUTION: A theme is used for b .

PROBLEM: If you want to degrade into a coma then you should sport another car .

SOLUTION: If you want to go into a coma then you should specify another car .

PROBLEM: You are likely to find a shopping basket around in food store.

SOLUTION:
You are likely to find a shopping basket around in food category .