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 wish I could give this video 0 stars. Don't waste your money on this video. It's a 4 hour tirade of this woman trying to be funny. She is not funny. The actual INFORMATION in this video could have been condensed into an hour or less- if you cut out all her nonsense.You could learn more in an hour of watching youtube videos and surfing- for free... and you won't have to endure this woman's awful personality and attempts at humor (numerous times SCREAMING into her microphone.) Also, the footage appears to be from the mid 1990's- very dated, it's like watching a VHS recording. If you don't believe me go ahead and buy this- you'll see.
Solution:
Negative