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: You are likely to find a character in a play in the evening .

SOLUTION: You are likely to find a character in a play in the workshop .

PROBLEM: Many types of bat use control insects .

SOLUTION: Many strategies of bat help gut insects .

PROBLEM: The cat ran up the space .

SOLUTION:
The cat ran up the sill .