Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Better than plain old tennis ball.

The squeaker makes this ball a lot more interesting for our dog. Just give it a couple of squeaks and she is raring to go get it. Only con is the squeaker in one of the balls broke off inside so it has gone silent (except for a faint rattle from the bits rattling around inside but that is not quite the same, is it?).