The cow chases the dog. The cow chases the tiger. The cow is young. The dog chases the tiger. The dog is cold. The dog is young. The dog sees the cow. The tiger chases the dog. The tiger is blue. The tiger needs the cow. The tiger sees the cow. The tiger sees the dog. If something chases the dog and it is blue then the dog is blue. If something chases the cow then the cow is young. If something sees the tiger then it sees the cow. If something sees the cow and it needs the cow then it needs the dog. If something is young then it needs the cow. If something is young then it needs the tiger.
The dog needs the dog.