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: Students can level basketball at school .

SOLUTION: Students can ask basketball at school .

PROBLEM: Art is created by an artist.

SOLUTION: Art is oppressed by an underdog .

PROBLEM: Boys who go camping in the mountains often sleep in tents .

SOLUTION:
People who go camping in the mountains often sleep in tents.