The cat chases the mouse. The cat visits the mouse. The dog chases the cat. The dog is green. The dog is nice. The dog needs the cat. The dog needs the mouse. The dog needs the squirrel. The mouse chases the cat. The mouse chases the squirrel. The mouse needs the cat. The squirrel is cold. The squirrel is not round. The squirrel needs the dog. The squirrel needs the mouse. The squirrel does not visit the dog. If something chases the squirrel and it does not chase the mouse then the mouse needs the cat. If something does not chase the mouse then the mouse chases the dog. If something needs the mouse and it chases the dog then it is round. If the mouse visits the squirrel and something does not need the mouse then the squirrel visits the dog. If something is cold and not nice then it does not chase the squirrel. If something is round and it visits the dog then it does not chase the squirrel.
The dog needs the squirrel.