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

Example Input: This book it simply one of the best science fiction stories ever written. It should be on the "must read" list for any sci-fi fan.
Example Output: Positive

Example Input: Phil Collins singing "Take Me Home" and Mark Knopfler performing "Brothers in Arms" and "Money for Nothing" are fantastic; heck, Elton, McCartney, Sting, Eric Clapton, Sting, Jimmy Buffett, Carl Perkins and Arrow are all great. This is a wonderful concert; I just wish I could have heard it in person.This DVD looks fantastic and sounds terrific--especially on a DTS capable system like mind. I buy music DVD's only if I can see that they have DTS encoding on the disk (Amazon please take note). However, in a few places--just a couple--the sound quality of "Music for Monserrat" falls down a wee bit compared to other music DVD's I have; otherwise, I would have rated it 5 stars.That said, this is a great DVD for those like me who love these artists.
Example Output: Positive

Example Input: Three's Company will always be the best comedy show that was on TV. When I heard that John Ritter had passed I did shed tears for the man because he was the best and will always be the best comedian out there. I have been waiting for the show to come out on DVD for a very long time. When I was a kid I would beg my mom to stay up so that I could watch the show. John Ritter will be deeply missed by all his fans. Rest In Peace John, we all miss you!
Example Output:
Positive