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

Input: Consider Input: I've owned this CD for a few years, yet thought something was slightly off, so I compared "Keep A Knockin" to another copy I have.Results:Original is 168 beats per minutes, while this version is 172 beats per minute.Original's time is 2 min. 23 seconds; this version is 2:16 min.

Output: Negative

Input: Consider Input: This was the biggest waste of money ever created. If you want to know the song that much, call the station and ask them, they don't mind, really.

Output: Negative

Input: Consider Input: I wish I could give this more then 5 stars. This concert tour was Tina's best concert. I almost did not buy this because I own this on video. When I recevied it, to my surprise, the DVD has four extra songs on it then the video. The songs are "Wildest Dreams" "Let's Stay Together" "Something Beautiful Remains" and "Better Be Good To Me" If anyone caught Tina on this tour, here is your chance to own the "complete" concert for ever!
Output: Positive