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.

Example Input: If you want to fly in an ecosystem then you should plan a time .
Example Output: If you want to hike in an ID then you should study a ticket .

Example Input: A blanket can be covering a bed.
Example Output: A Man can be washing a bed .

Example Input: A roof can be found on top of a building.
Example Output:
A roof can be found on top of a concrete .