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: If you want to announce a contract then you should flash a blue pen .

SOLUTION: If you want to sign a pass then you should use a blue pen .

PROBLEM: You are enough to dye a dime of blood in a small wound .

SOLUTION: You are likely to find a tract of cardboard in a small tank .

PROBLEM: You can use a line to to protect the possession of the football.

SOLUTION:
You can use a ribbon to to protect the possession of the football .