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

Example Input: My husband and I were not able to attend a birthing class, so the doctor suggested we rent/buy a video. We decided on this one, and although the 'teacher' was a bit corny it was helpful. I especially liked that you could fast forward and skip parts! All in all it was a worthwhile purchase and proved helpful to us both.
Example Output: Positive

Example Input: I just received this today and while I knew to expect nothing hand crafted, I was shocked at how amazingly flimsy this thing really is. The bottom wood actually came with a huge crack; big enough to leak out all the sand. The feet were glued on with cheap glue and 3 of the 4 came off in transit. Based on the construction, I'm amazed it was even in one piece.The reason this gets 2 stars is that the accessories are pretty decent. And the sand looks fine. If this wasn't cracked in the center, I'd most likely have kept it and it would have "worked" for its purpose. Having said that, if you are looking for a desktop zen garden, look elsewhere.
Example Output: Negative

Example Input: This book dates back to the civil war era. It was the fashion source that women turned to for the most current information on what to wear. If you have ever wondered what they really wore, and why they wore it then I would suggest that you look to these books for the answers. Typically these books have a full year bound together. Each month should have a color fashion plate featuring the current wardrobe fashions. They also have music, poems, short stories, knitting and crochet patterns, health tips and cooking hints. They provide a valuable insight into the era. If you are a civil war reenactor there is no better source for accurate information, and if you are just a fan of American history, these books are an outstanding source.
Example Output:
Positive