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

Example Input: Rated for 3+ but my 2 and 3 yr. olds both play with this. While the kids like playing with this, I like that it can grow with them. It has basic tools for younger children: rolling pin, presser with three tips, pizza cutter, safety scissors, play-doh knife. But it also has tools/items for older ones: bead making, art molds for pictures and "sand".The only con is the mat. It's cheap plastic. Sounded great on the box in the store, but ends up crinkled underneath them and not protecting the floor. Stick with using and old sheet or vinyl table cloth from the $1 store.
Example Output: Positive

Example Input: The best thing I found in this book is the picture on the cover. Well, actually the uncropped version in chapter 5. Beyond that, I found everything else to be non-practical from a design perspective. A photo of a filthy dust collector area when discussing the advantages of central collection or electrical wiring that would never pass inspection is typical. I'd rather see plan views of real shops that work with reasons for the decisions made.
Example Output: Negative

Example Input: I read book Quick and Easy Way to Effective Speaking. It gave me practical skills to do my presentation in the right way. I defended my thesis on 29th of December 2010. Some professors said me, that it was interesting speech. The principle of effective learning is read and do as written. Moreover it allow me to raise my language skills in English, because this book is written in understandable way and I am Russian. Many thanks to author and people who produced this book. Danil from Tomsk, Siberia
Example Output:
Positive