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

Example Input: You aren't saving any being this adapter. I purchased this for a 12" G4 Powerbook. The power it supplies goes on and off constantly. This can't be good for the computer. It certainly doesn't charge it. Don't waste your money on this Macally adapter. Try to find an original Apple adapter if you can.
Example Output: Negative

Example Input: While this movie was not "highly acclaimed" when it was released, back in the late 1960's or early 70's "I think," I have always like it and watch it about once every two or three years. It is the kind of movie that you never get "fully bored with."On a scale of 1-5 stars, I give it only four (4) stars, since it is one of those movies that many "action junkies" would not like; even-though, it actually has quite a bit of "lower key action" and beautiful phototgraphy to support it.My bottom line is: "If you liked Dr. Zhivago then you will, or should, like Ryan's Daughter."
Example Output: Positive

Example Input: This charger is horrible. Worked for long enough for me not to be able to get my money back from Amazon. Makes the screen blink while charging and flashes back and forth from charging to not charging. Customer service at this company is horrible. After waiting two weeks for a response they wanted me to send it back before I get a new one. Who knows how long that will take. I am probably going to have to trash this waste of money for the more expensive Apple one. I guess you get what you pay for.
Example Output:
Negative