Text: A doberman bites a large blue ball.
Entailment: This dog plays with his toy.
Contradiction: The cat toys with the catastrophically injured yet alive mouse before putting it out of it's misery.  Just a few more broken ribs and guts coming out the anus, and Kitty Kat will let you die, mouse.  Then the cat will go leave a steaming pile of parasitic feces in the litterbox.  Cats are cute!