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

Example Input: While old and out of print, this book is a very good way to learn the basics of photography. You have to ignore most of the references to digital cameras as the technology has changed a lot.
Example Output: Positive

Example Input: A classic story based on history. One of Hypatia's crimes appears to have been ready to provide a hypothesis of a heliocentric universe, long before Copernicus and with a much worse response from the Christian community.
Example Output: Positive

Example Input: For basic instruction this tape is OK. Her oral description of the techniques is clear. Atea is not relaxed at all in her instructions or moves. In the instruction part of the video she seems like a puppet controlled by strings. She is too skinny, unattractive and doesn't even have an attractive navel. She fails to hold your attention. Her other dancers are a bit better, but the whole tape seems so contrived and does not move with a natural flair. For verbal instruction, OK, for visual efects you can get much better. And the dance at the end is a real joke. Your money is better spent on Suhaila!
Example Output:
Negative