The dog chases the lion. The dog eats the lion. The dog is big. The dog is cold. The dog is green. The dog is red. The dog is round. The dog needs the lion. The lion chases the dog. The lion eats the dog. The lion is big. The lion is cold. The lion is green. The lion is red. The lion is round. The lion needs the dog. If someone is red and round then they need the dog. If someone eats the lion and they need the dog then they chase the dog. If someone eats the lion and the lion eats the dog then the lion is green.
The dog does not need the dog.