Part 1. Definition
Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Part 2. Example
I've read this book with much expectation, it was very boring all through out the book
Answer: Negative
Explanation: Review writer does not like the book because it was boring, therefore it is a negative review.
Part 3. Exercise
I read this book for the first time more than 10 years ago, and I found it fascinating. I have read it again from cover to cover at least twice since then. It is very well researched, and I couldn't put it down. I wish I knew where Ms. Auel got all the information she did on the herbs and plants that she describes in her book, that the characters (Iza and Ayla) use for medicine. Some of them (like the willow bark) I know for a fact were used, and I wonder if all of the other herbs and plants really work the way she describes... Guess I'll have to check on herb and plant books for that matter! In any case, I also read the other books of the series (The Valley of Horses, The Mammoth Hunters and Plains of Passage), and I regularly check to see if Ms. Auel has published another book of this series. Hurry Ms. Auel, there are a lot of us waiting to hear what happened to Ayla.
Answer:
Positive