The bear is not nice. The bear is not red. The bear needs the cow. The bear needs the rabbit. The cow does not chase the rabbit. The cow is round. The cow visits the bear. The dog chases the rabbit. The dog is green. The dog needs the bear. The rabbit chases the cow. The rabbit is red. If the bear is blue and the bear is not round then the bear visits the dog. If something is not green then it needs the dog. If something needs the dog and it is nice then the dog needs the bear. If the cow is nice then the cow does not visit the dog. If something does not visit the cow then the cow is nice. If something does not need the bear then it needs the cow.
The dog does not need the dog.