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

Example Input: It does an excellent job on mildewed wood such as decks and deck furniture without using chemical mode which is the only weak link in an otherwise strong chain. Unfortunately, the only effective chemical solution is chlorine which acts more or less on its own but cannot be used with this machine. Safe cleaners, such as Simple Green are no more effective than when used without them. Other than that, it's a great product.
Example Output: Positive

Example Input: This book it simply one of the best science fiction stories ever written. It should be on the "must read" list for any sci-fi fan.
Example Output: Positive

Example Input: This book is an anthology of 3 books I had already read. I do not knowingly purchase anthol;ogies. O would not recomend this book unless yoy want all 3 books in one.
Example Output:
Negative