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

Example Input: My wife is the reader and she dearly loved this book. So down to earth and factual.
Example Output: Positive

Example Input: this product is good for child I guess..cause it is a little thin...but it is better than the one I saw on sports authority which is thiner
Example Output: Negative

Example Input: These are wonderful postcards for any dog and/or animal lover. The photos are very well-done and the dogs are adorable.As the previous reviewer stated, the postcards are black and white pictures of dogs with a short bit of information on the back including the photographer, title and date of the photograph and a short bit of information on the dog in the photo.They are printed on thick 6" x 6" cardstock, which will make them durable in the mail (if you intend to mail them). However, it should be noted that at this size, the postcards mail at letter rate and not postcard rate.
Example Output:
Positive