The bear needs the cat. The cat does not need the tiger. The tiger likes the cat. If something needs the cat and it does not visit the cat then it visits the bear. If something visits the bear then it does not need the tiger. If the bear is nice and the bear visits the cat then the bear needs the cat. If something likes the tiger and the tiger visits the bear then the tiger does not like the bear. If something likes the bear and it is not kind then the bear visits the tiger. If something likes the bear and the bear does not visit the tiger then the tiger visits the bear.
The bear does not visit the bear.