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: 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.
Student:
Negative