The cat needs the dog. The dog needs the mouse. The lion is rough. The mouse needs the dog. If someone chases the dog then they chase the mouse. If someone chases the lion then they need the dog. If someone eats the cat and they chase the mouse then the mouse is cold. If the lion is green then the lion is young. If someone chases the lion then they are rough. If someone is young and they chase the mouse then they eat the mouse. If someone is cold and they chase the cat then the cat needs the dog. If the lion is rough and the lion needs the cat then the lion needs the mouse.
The dog needs the mouse.