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

Example Input: Crap, crap, crap. Bad acting, big explosions, and video game CGI a good movie does not make. Like a 2 hour Hasbro toy commercial. This film made Star Wars Episode 1 with Jar Jar Binks seem like an Academy Award worthy film. And I'm a Superhero/Godzilla/Monster geek...this is just awful...terrible. At least the first one was semi-watchable--and where's Megan Fox? That would have been the only redeeming quality in this junk-fest...I mean alien robots who change into cars and trucks??? It's a movie based on a TOY for God's sake! A bad toy made into an even worse film. Avoid like The Plague.
Example Output: Negative

Example Input: This video is fine for ballroom dancers, but it has nothing to do with the authentic Argentine Tango. Even ballroom dancing has now a separate category for Argentine Tango. Unfortunately, this video is not that. That's why, I rate it at 1.
Example Output: Negative

Example Input: Although this might be a good book to introduce issues in technical writing to someone considering the field, it is not useful if you want anything more than a broad overview. The information it contains varies widely in depth and is sometimes dated; for example, there are several paragraphs discussing the features of dot-matrix printers but only one short and incomplete list of the types of bindings available for professionally printed documentation. For some unclear reason, two sections on editing are separated by 10 pages on usability testing. If you are actually involved in technical writing, there are better books.
Example Output:
Negative