Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
One example: I've read this book with much expectation, it was very boring all through out the book
Solution is here: Negative
Explanation: Review writer does not like the book because it was boring, therefore it is a negative review.

Now, solve this: I am currently taking a birthing class and it did not cover many areas that this DVD covers. I am so glad I purchased this video. The price is very good for the information received.Updated 30 Nov 10 :This video was a life saver. The useful information allowed me to make an informed decision for having natural child birth vs medical intervention and delivery (epidural and possible C- section). I had natural child birth and was very pleased to find out that the pain was tolerable without medication and I wasn't hooked up to anything except a Hep lock. If you are having your first baby you should watch this video with your spouse/partner so that you can create a birth plan before delivery. Also, look at the Business of Being Born video by Ricki Lake it is also very informative.
Solution:
Positive