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

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
I take group bellydance classes and have been to seminars and workshops. This is bellydance but only the very simplest form. Atea is ok and this is a good tape to start with if you are not sure how serious you are about learning. It introduces you to things like veil and zills but it does not instruct you on them. If you are sure you want to dance you should shop around spend just a little more money getting a tape from someone/troup that dances a style you are interested in and has a well known face and name. For example Fat Chance Bellydance for American Tribal style or Aisha Ali for African dance or someone well known for Egyptian or Turkish Caberet. If this is a serious investment for you-get a good tape, beginner or otherwise if you search around you will find several.
Answer:
Negative