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 can purchase the bear at retail .

SOLUTION: You can see the process at Edit .

PROBLEM: The source basically wants java .

SOLUTION: The world basically wants peace.

PROBLEM: The ure of staying in bed is to avoid work .

SOLUTION:
The effect of staying in bed is to avoid work.