The bear needs the cow. The bear sees the cat. The bear sees the cow. The bear visits the cow. The bear visits the tiger. The cat sees the cow. The cow sees the bear. The cow does not see the cat. The tiger needs the cat. The tiger visits the cat. If someone needs the tiger and they see the bear then the bear is not green. If the cow needs the cat then the cow does not see the tiger.
The bear does not need the bear.