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 student can begin a renewable school year .

SOLUTION: A student  can begin a new school year.

PROBLEM: You are embarrassed to find a gentleman in big chair .

SOLUTION: You are likely to eat a gentleman in big house .

PROBLEM: You would take a phone a because you want to learn .

SOLUTION:
You would take a phone call because you want to learn.