The dog chases the squirrel. The dog eats the squirrel. The dog is nice. The dog is round. The dog sees the squirrel. The squirrel chases the dog. The squirrel eats the dog. The squirrel is blue. The squirrel is cold. The squirrel is nice. The squirrel is round. The squirrel sees the dog. If someone sees the squirrel and the squirrel sees the dog then they chase the dog.
The dog does not chase the dog.