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

Ex Input:
An extremely helpful gem on a complex subject of second century religious authority and textual use. For anyone serious about this period and the interelation of cultures, this book is essential. Is it complex and detailed? Of course, it must be to argue the point. Should you buy it? Yes, unless you want to keep running back to the library. I write this only after thoroughly disagreeing with the review above.

Ex Output:
Positive


Ex Input:
Like all of her Scarpetta mystery novels, Patricia Cornwell has proven again that she must have been one dynamite of a Coroner when she was practicing. She has a wealth of information in her books and it is so interesting to follow as she progresses to solving the mystery. I've never enjoyed reading as much as when I pick up a Cornwell novel.

Ex Output:
Positive


Ex Input:
I loved all of Sophie Kinsella's books. This book is definitely not as good as the Shopaholic Series. The characters aren't really well-defined, the plot meanders at the end. You can avoid this book and not miss much.

Ex Output:

Negative