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

Ex Input:
I've been a longtime fan of Mercedes and own most of her Valdemar series. So, of course, I picked this book up at my local store. After wrestling through 50 pages, I gave up! I plan to sell it back to my local store ASAP- this is nothing better than a paperweight in my bookshelves. The worst part is, my boyfriend picked it up and tried reading it. Now he thinks that this is a good example of her work!

Ex Output:
Negative

Ex Input:
I have had to replace my powerbook power cord twice already. Both times before I broke the bank by purchasing the cord from apple. Big mistake. Although steep in price those things are C-H-E-A-P! This last time i decided to go with the Macally. What a great deal! Much more durable than then apple version. It is also more compact. The only thing missing is the indicator light to let you know if the battery is charging. Not a big deal for such a great price!

Ex Output:
Positive

Ex Input:
I saw D. Ebby 35 years ago on the 700 Club, wanted this book for all those years. It was brought to my attention by another minister of the gospel just recently. Saw it on Amazon and decided to buy it, it was inexpensive. The pages fell apart as I read the book, it was extremely frustrating but? So enjoyable and encouraging, I was glad I bought it. I am going to look for the same book in better condition, just to reread or give to another to enjoy.

Ex Output:
Negative