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

Example Input: This is one for the hard core action fans. There's very little 'down time' to run for popcorn. If someone isn't getting shot, punched, etc. things are getting blown up or sunk in water. There is an action scene I haven't seen yet with a police car. Several of the action scenes are worth a rewind and I did appreciate the 'buff bodies'. You have to give these guys an A plus for working out.Chrissy K. McVay - Author
Example Output: Positive

Example Input: What am I reviewing here... this gizmo or the supplier, Eforcity? I never received this product after my order! After waiting and waiting I contacted Eforcity several times -- no reply. After a nasty letter from me Eforcity'r reply feigned lacking information about my mailing address!What a cop-out.I told them I would not pay for it, so Eforcity said they'd give me a refund, which has not come to me yet. I bought another product to replace this from Amazon which arrived quickly from Amazon.
Example Output: Negative

Example Input: This book in my opinion is biased and takes an angle of Europe that is "clean and proper" and fails to shed light on the rest of it. I can understand that these are "tourist guides" and why would anyone want to tour a country forgotten by time. However, I am a very disappointed Romanian with this book and would never use it as my reference. I have seen travel guides outlining Europe exclude Romania before, but with the precision and detail of DK's series, I was left yet again in disappointment.
Example Output:
Negative