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 bow can be threaded in a gun .

SOLUTION: A parachute can be packaged in a gun .

PROBLEM: You are likely to find an army in a col .

SOLUTION: You are likely to find an army in a store .

PROBLEM: You can rob a place to eat to have lunch .

SOLUTION:
You can collect a place to eat to have lunch .