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