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

Ex Input:
Koontz can write. But he sucks as a story teller. Books are supposed to have a COMPLETE story in them, no? Well this one has no ending. No end at all. These 2 detectives are clued in to the fact that Dr Frankenstein exists, and is creating his "perfect race" to some day kill off all humans. That's it. You meet the original, now educated and "at one with the universe" Frankenstein's monster, you meet the main characters, and they have some conflict. That's the whole "story" in this book, which it really isn't because the basic elements of a story are a beginning, middle, and end.

Ex Output:
Negative

Ex Input:
I enjoyed this book-- it was much better than the standard "chick lit" titles. It was a lightweight story, easy to read, and the Roman food, cooking, markets and people were fun. Didn't mind the creative cursing-- how very true to "Roman young stud" it was! Maybe the Laura character was a bit underdeveloped, but I much prefered to read about Bruno.I liked this book SO MUCH more than "Cooking for Mr. Latte" - it was a fun read.

Ex Output:
Positive

Ex Input:
I used this tool for at least 4 days a week for at least a few months for several hours a day until i sold it to a coworker when i bought a Dynabrade turbine powered 100,000 rpm pencil grinder....which really sucked and had little to no torque whatsoever. so it was usless to me and I completely regret buying that expensive p.o.s.. I used the Sioux to put some heavy edge breaks on some very hard metal parts. So I put alot of pressure on this tool alot. For the most part it had a good amount of torque. The wedges on the inside of the pencil grinder eventually broke after a few months but that was after a whole lot of abusive work done with it and those wedges are very easily replaced and cheap. this pencil grinder works well with even titanium and inconel which are very hard metals

Ex Output:
Positive