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

Ex Input:
Adapter worked flawlessly for six months, then became intermittent. Seems to be broken or shorted somewhere near the connector to the computer. Even the ridiculously flimsy cord from Apple lasted longer than six months, so I can't say I'm pleased. Macally says they'll sell the connector cable separately for $17.00 which is not much of a bargain.

Ex Output:
Negative


Ex Input:
My husband and I were not able to attend a birthing class, so the doctor suggested we rent/buy a video. We decided on this one, and although the 'teacher' was a bit corny it was helpful. I especially liked that you could fast forward and skip parts! All in all it was a worthwhile purchase and proved helpful to us both.

Ex Output:
Positive


Ex Input:
These may work for some people, but for others like me, they're worthless. The fit was horrible and they did not stay in my ear. They also caused my Jawbone Prime to protrude far enough so that the front part no longer touched my face (which is required for their noise reduction circuitry to work). I threw these away and am now using the stock earbud with the ear hook.These are designed for people with a certain ear shape. If your ears don't conform to this shape (which is likely the case for many people), these will be useless. If you want these, I suggest buying from a local store where you might be able to try them on, or at least to return them without having to pay return shipping.

Ex Output:

Negative