The bear is blue. The mouse is not round. The rabbit does not need the mouse. If something is not young and it does not visit the mouse then it chases the rabbit. If something is round and it visits the rabbit then it needs the bear. If something needs the mouse then it does not chase the bear. If something visits the mouse and it does not chase the mouse then the mouse chases the bear. If something visits the bear then it needs the rabbit. If something needs the rabbit and it does not chase the rabbit then the rabbit chases the bear.
The mouse chases the mouse.