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: I had a wonderful time reading the book (and taking notes). It reminded me of the multiple occasions in which I have failed for lack of skills, but also showed me that there is a methodology to follow next time I have to confront a violated expectation (probably within the next five minutes)
Student:
Positive