The bear does not need the cat. The bear visits the cat. The cat is rough. The cat does not need the bear. The cat needs the mouse. The cat does not visit the cow. The cat visits the mouse. The cow is big. The mouse is big. The mouse needs the bear. The mouse needs the cow. The mouse does not visit the cow. If something visits the cow then it does not need the cat. If the bear visits the cat then the bear is big.
The cat needs the mouse.