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

Ex Input:
This DVD is one of my all time favorite musical DVDs. Miss Jackson proves why she is the highest paid singer in the industry. With a combination of costume changes, great choreography, Janet's greatest hits, and a sold out crowd at Madison Square Garden, the DVD makes for an excellent night of entertainment. I only regret that I was not able to see the concert in person here in my home town due to a cancelation of the concert;however, the DVD is definately a suitable substitute. I highly recommend this DVD to any fans of Janet, lovers of music, and owners of quality DVDs.

Ex Output:
Positive

Ex Input:
I was extremely disappointed with the fabric and color when it came. It is obvious that it is of poor quality but I guess you get what you paid for 10 bucks.The zipper of the plastic cover of one set was broken.I bought 2 queen sheets and I wanted to return both purchases if only I did not have to pay for shipping.Do not buy this!!!! You will regret it.

Ex Output:
Negative

Ex Input:
Amazon makes it easy to find obscure releases from lesser known artists. The one-click shopping is easy to use. The item was shipped and received very quickly and arrived in perfect condition.

Ex Output:
Positive