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

Example Input: This product requires a stereo player in which the balance is turned totally to the left. Most auto systems have that capability. However if you have Dolby or SurroundSound, it can be difficult (and maybe impossible) to play the cassette without hearing two recordings at the same time. Unfortunately neither the packaging nor the website will warn you of the problem. You therefore should think before buying. Once you have opened the packaging you may be unable to return the product.
Example Output: Negative

Example Input: I teach The Odyssey, and let me tell you, this movie does NOT reflect the book well, if you're watching it for testing purposes (and I know you are!) However, I DO show selected scenes (out of sequence because the movie is out of sequence) just because my students think it's fun. WHEN will a GOOD version be made??? I had such hopes for Troy, and meh....My students' favorite part is the inexplicable arm action of the guard who announces "Tele-machos of Ithaka!" Scenery WILL be chewed - even the usually OK Greta Scacci comes off rather poorly.
Example Output: Negative

Example Input: This compilation befuddles me.The sound is a bit muffled on the tracks listed as 2000 remastered when compared with the John Denver's Greatest Hits.Not all tracks are 2000 remastered. Calypso and I'm Sorry are listed as 1975. They sound and look like the same files as Denvers's Greatest Hits when brought into audacity editing software.It also seems the 2000 remasters are not the original arrangements.I have both this "Best of Rocky Mountain" and Best of Volume 1 & 2.The Rocky Mountain version does dull or soften Denver's voice. Some may like that.But if dulls the instruments.I prefer the Best of Volumes. They are sharper with more detail to the instruments.
Example Output:
Negative