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

Ex Input:
If I could give this half of a star I would. I am a big fan of Nirvana, but this was a total disappointment to me. The tracks sounded awful. I felt like I was ripped off in every sense of the way. I took it to a buy-trade-sell place and not even they would offer me anything for it, which shows you the poor quality of this album. A word of advice; DO NOT BUY THIS!!!!!

Ex Output:
Negative


Ex Input:
London-born violinist and conductor John Georgiadis is in charge here, exhuming and enlivening long-forgotten dance music from the pen of Josef Strauss. After he was bulldozed into joining the family dance-music business, engineer-trained Josef (1827-1870) proved to be the most industrious of all the Strauss family during the remainder of his short life. I reckon, having collected and listened to all the volumes so far issued in this Marco Polo Josef Strauss Edition, that inspiration and innovation did not always keep up with his gruelling work schedule. Reliance on the family formula seems evident in most of the items on this CD, where you'll find a spanking little march, three waltzes, a quadrille and a variety of polkas, heard best at concert hall volume so that subtle lifts in rhythm and phrase and the skilful orchestration are heard to best advantage.

Ex Output:
Positive


Ex Input:
this Book takes you on a journey for knowledge and understanding. it speaks to gaining something that is powerful that will be a stepping stone for better days and times ahead. this Book deals with expierences and coming to terms with life and how it has been dealt and the choices that you have to make.alot of issues and challenges are met head on and dealt with. very strong and well written book.

Ex Output:

Positive