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

[Q]: The title of this video mentions Argentine Tango. Unfortunately, what is being taught on this tape is not authentic Argentine Tango. Not even close. It's ballroom tango. There is a huge difference: in music, style, steps, posture, etc... Don't be fooled by ballroom instructors trying to teach Argentine Tango. The only authentic instruction available on the market comes from authentic Argentine instructors from Buenos Aires.
[A]: Negative


[Q]: I've bought several air beds from various manufacturers. I bought one identical to this one 1 1/2 years ago. It was comfortable but lost air after 3 months. I justified this as the user may have not taken care. However, I now believe its the brand. This one would not inflate at all. I will not buy this brand again. I've had great life from a better brands.
[A]: Negative


[Q]: 30 minutes into it and I'm bored out of my mind. Woe is me "hero", terrible acting, yes it's an action movie, so let's see some action, don't try to wow me with dialog. If you're looking for something to grab your attention, this isn't it. Thankfully I didn't have to pay for the movie.
[A]:
Negative