The bear eats the cat. The cat chases the bear. The cat eats the bear. If something eats the bear then it eats the cat. If something chases the cat and it is not red then the cat does not chase the bear. If something needs the bear and it does not chase the bear then the bear chases the cat. If something is young then it does not eat the bear. If something is rough then it does not need the bear. If something needs the bear then the bear needs the cat. If something needs the bear and it is cold then the bear does not chase the cat. If something needs the cat then the cat needs the bear.
The bear does not need the cat.