The cow is young. The dog does not chase the cow. The dog chases the lion. The dog does not chase the tiger. The dog eats the cow. The dog is green. The dog needs the lion. The lion eats the cow. The tiger chases the dog. The tiger chases the lion. The tiger eats the lion. The tiger is rough. The tiger is not round. The tiger does not need the cow. The tiger does not need the dog. The tiger needs the lion. If something chases the cow and it does not eat the dog then the dog needs the cow. If something is round then it eats the lion. Young things are round.
The dog does not need the cow.