The bald eagle likes the dog. The cat chases the bald eagle. The cat likes the dog. The dog chases the bald eagle. The dog chases the lion. The dog is blue. The dog is nice. The dog likes the bald eagle. The dog likes the cat. The dog does not need the bald eagle. The dog does not need the cat. The dog needs the lion. The lion chases the dog. The lion likes the bald eagle. The lion needs the cat. If something chases the lion and it does not like the cat then the cat does not chase the dog.
The dog needs the cat.