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

Example Input: If you are of a certain age and experience, you already know about Dharma Bums.If you are of another certain age and experience, this book goes against everything taught by Saint Ronald Reagan, and so you should avoid it.If you are young, give this book a try. Better yet, instead of buying it, go to the local library to read it. Unless the people I described in my second paragraph have taken over and there are only Approved Books in the library...if there are libraries at all. Libraries cost money, and that means (shudder) taxes.For everyone else: this is Kerouak's best work.
Example Output: Positive

Example Input: I'm sure I would be able to understand the vivid descriptions and symbolism in this book much better, if Hawthorne were not writing in some sort of moon man language. I don't know about the production of narcotics in the 1800's, but I honestly think that Hawthorne wasn't on a natural high if you know what I'm saying.
Example Output: Negative

Example Input: Written in 1970's it's really too old to apply to todays lifestyles and trends on fry cookery but it does have some classics. Glad I bought it used-but shipping was more than the price!
Example Output:
Negative