The bear chases the cat. The bear does not chase the cow. The bear eats the cat. The bear eats the cow. The bear is not rough. The bear needs the cat. The bear needs the cow. The cat chases the bear. The cat does not chase the cow. The cat is green. The cow chases the cat. The cow eats the cat. The cow is green. The cow is round. The cow needs the bear. The cow needs the cat. If the bear eats the cat and the cat does not eat the cow then the bear needs the cow. If something eats the cow and the cow does not need the cat then the cow is round.
The cow needs the bear.