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: An island is for being surrounded by water.

SOLUTION: An island is for being surrounded by world .

PROBLEM: People can gather money .

SOLUTION: People can spend money.

PROBLEM: You would fix a detail because you forget the background .

SOLUTION:
You would fix a computer because you like the challenge.