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 are likely to forget a decade in a forest .

SOLUTION: You are proud to find a leaf in a coffee .

PROBLEM: If you money to go to a performance then you should buy a glass .

SOLUTION: If you want to go to a monastery then you should buy a bull .

PROBLEM: Children depend on their institutions .

SOLUTION:
Children depend on their parents.