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: In modern society , an industry occurs to make money for the owners .

SOLUTION: In modern society , an industry increases to make money for the owners .

PROBLEM: The effect of attending a rock circuit is listening to laughter .

SOLUTION: The effect of attending a rock concert is listening to music.

PROBLEM: You are likely to find a shark around in the open ocean.

SOLUTION:
You are likely to find a shark around in the plain ocean .