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

Input: Consider Input: An exellent study of the German Airforce from the fall of Sevastopol in the Crimea to its failure at Stalingrad. Very well written, with a clear analysis of the events. Well worth the money and it belongs in every major collection on World War II's Eastern Front.

Output: Positive

Input: Consider Input: I did not know this was the audio cd of the game, I thought it could be used on the playstation. Maybe the other guys are from the US or somewhere where it is actually easy to get the game,and play it,but this was all in japanese and was not compatible with my machine. I am deeply disappointed as i love the arcade game, but the Dance stage euromix (Dance Dance Revolution equivalent) is lacking in decent tracks, many are jungle-y and are difficult to dance to them. Also, most of these tracks are unheard of here and are therefore not very enjoyable. However, my favourite are Keep on moving, make a Jam, and Video Killed the Radio star. But it gets a bit pedantic if you keep playing on these tracks. If anyone is in the same situation as I am, or those of you who are lucky enough the play on the newest version, can you please let me know where I can order one? I am in dance deprivation/boredom!

Output: Negative

Input: Consider Input: Wilmington Chester Mass Choir is incredible. I highly recommend this inspirational gospel choir CD. I especially love the song "Holy, Holy, Holy", it alone is worth the price of the CD. You can realyy "feel" the Lord when you hear thier music, and you know they mean every word and note of it. Thank you Amazon.com for featuring this CD, I had a hard time finding it anywhere else.
Output: Positive