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

[Q]: Great book for people that need to write email. It would be nice to review the grammar rule's from time to time.
[A]: Positive


[Q]: very interesting book. was one of those you do not want to put down. it gave a different perspective of the happenings of the manson family. however, one must keep in mind it was recorded from what charles manson believed happened. great book.
[A]: Positive


[Q]: This book, was far too long, and was not at all appealing. The length of the book, bored me to tears, and was too hard for people unfamiliar with his work (i am though somewhat familiar but still his theories made no sense to me and lacked relevance in my life). The book went into painstaking great detail describing dreams and interpretations. His theories and interpretations were intriguing, and informative, but lacked any research to back up his theories.
[A]:
Negative