Teacher: Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Teacher: Now, understand the problem? If you are still confused, see the following example:
I've read this book with much expectation, it was very boring all through out the book
Solution: Negative
Reason: Review writer does not like the book because it was boring, therefore it is a negative review.

Now, solve this instance: My brother was coming to stay for a week in our apartment, so I needed something that would not be totally uncomfortable for him to sleep on 5 nights in a row. This air mattress did the job. It did a nice job of staying inflated throughout the week. My brother actually preferred the feel of it after a couple of nights (got slightly softer due to minimal air loss). The only issue I had was not being able to get 100% of the air out of it during deflation. We used the motor to remove most of the air, but towards the end it couldn't force the rest out. I tried pressure, but it seems as if the release has to be a certain angle to let the air escape. It still folded up and fit in the bag (barely). But overall, it held air and that's what we needed it to do.
Student:
Positive