The bear is nice. The bear is round. The bear needs the cow. The bear needs the dog. The bear visits the cow. The bear visits the dog. The cow chases the dog. The cow is round. The dog chases the bear. The dog is nice. If something chases the bear and it is rough then it visits the bear. If something needs the dog and it visits the dog then it is red. If something is red and it chases the cow then it needs the bear.
The cow does not chase the dog.