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

Q: This video is fine for ballroom dancers, but it has nothing to do with the authentic Argentine Tango. Even ballroom dancing has now a separate category for Argentine Tango. Unfortunately, this video is not that. That's why, I rate it at 1.

A: Negative
****
Q: I've been a longtime fan of Mercedes and own most of her Valdemar series. So, of course, I picked this book up at my local store. After wrestling through 50 pages, I gave up! I plan to sell it back to my local store ASAP- this is nothing better than a paperweight in my bookshelves. The worst part is, my boyfriend picked it up and tried reading it. Now he thinks that this is a good example of her work!

A: Negative
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Q: I found that this module wouldn't work in my computer,though industry-standard low density memory workedfine. Kingston technical support confirmed that thiswas high density memory and would not work in my PC.When I asked them to swap it for standard memory, theresponse was that I bought the wrong memory, and itwasn't their problem to exchange it to make it work.I'll not buy Kingston products again.

A:
Negative
****