Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
--------
Question: As a student of jiujitsu i understood alot of the moves but i found that without previous knowledge these pictures and instructions were difficult to understand. I feel there is alot of good information but not worth buying.

Answer: Negative


Question: 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.

Answer: Positive


Question: Just as the title says, book of nonsense. A book of poorly written rhymes, lacking even a hint of smutty humour.

Answer:
Negative