The cow chases the dog. The cow is kind. The cow sees the mouse. The dog eats the cow. The dog is blue. The dog is green. The dog sees the mouse. The mouse eats the cow. The mouse eats the dog. The mouse is blue. The mouse sees the cow. The mouse sees the dog. If someone sees the cow then they chase the cow. If someone is rough then they chase the mouse.
The dog does not chase the dog.