The bear needs the tiger. The mouse is green. The tiger chases the mouse. If something visits the bear then it visits the mouse. If something chases the tiger then it visits the mouse. If something chases the bear then the bear visits the mouse. If the mouse is green then the mouse chases the bear. If something chases the tiger then the tiger is red. If something chases the mouse then the mouse needs the tiger. If something visits the tiger then the tiger visits the bear. If the bear visits the mouse and the mouse visits the tiger then the mouse visits the bear.
The mouse does not need the tiger.