Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Ex Input:
If you enjoy the hype of the Academy Awards, this is the book for you. Plenty of behind-the-scenes action that you're not going to find by simply watching the Academy Awards. It's gossipy, dishy, and dirty...a definite guilty pleasure. Great index of past Academy Award winners and nominees as well.

Ex Output:
Positive

Ex Input:
This CD is great for some people, but I think a lot of other people are buying it who maybe shouldn't.For the Nirvana fanatic with money, get the full boxed set, you will probably find the DVD and the book to be worth the extra money, even if you don't listen to the added tracks.If you aren't a fanatic, stick with the albums. You will not like the low sound quality of the recordings.Now, for the Nirvana fanatic who's a bit short on cash, but absolutely has to have "Do Re Mi" as part of his collection, that's who this is for. "Do Re Mi" is an excellent track, one of Nirvana's best...so if you are a serious Nirvana fan, you DO need to have that one.

Ex Output:
Positive

Ex Input:
This technology module contains a brief introductory description to the exchanger type above, followed by information on construction, construction materials, operating limitsand principal applications. Where appropriate, a comparison is made with conventionalshell and tube heat exchangers to emphasise size and weight reductions that can beachieved by using compact heat exchangers.The Module 3 series present further information applicable to all technologies, such asgeneral advantages and limitations of compact exchanger designs, common applications,fouling and how to minimise it, energy efficiency. heat transfer enhancement, exchangerselection, specification and operation, process intensification and software programmes.

Ex Output:
Positive