The bear is cold. The bear is green. The bear needs the cow. The bear sees the dog. The cow is cold. The cow is green. The cow sees the bear. The dog eats the cow. The dog is cold. The dog is green. The dog is young. The dog needs the cow. If the dog is cold and the dog is round then the dog needs the bear. If something needs the cow and the cow is green then it is round.
The dog does not need the bear.