The cat chases the tiger. The cat eats the dog. The cow chases the cat. The cow chases the tiger. The cow does not eat the cat. The cow is blue. The cow is round. The cow needs the cat. The cow does not need the dog. The dog chases the cow. The dog eats the cow. The dog eats the tiger. The tiger eats the dog. The tiger is round. The tiger needs the cow. The tiger needs the dog. If something chases the dog then it does not chase the cow. If something does not eat the cow then it chases the dog.
The dog does not chase the dog.